The first symptoms found in people drinking arsenic contaminated water include pigmentation changes in the skin and skin thickening or hyperkeratosis. Shorthand notation Uses the noble gas of the previous line. In its metallic form it is bright, silver-grey and brittle. Apologies, we are having some trouble retrieving data from our servers These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. The nucleus is composed ofprotons andneutrons. The RSC makes no representations whatsoever about the suitability of the information contained in the documents and related graphics published on this Site for any purpose. Term. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. PubChem. Iron is a metal in the first transition series. Atoms of the same element with different numbers of neutrons. Rather than just give an answer, let us build it. WebUse noble gas notation to emphasize the arrangement of electrons in the highest principal energy level. Br: Definition. Our videos prepare you to succeed in your college classes. 83.79 amu. This is due to the fact that all the orbitals up to that noble gas are completely filled. How do electron configurations in the same group compare? It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. atomic number 33 atomic weight 74.921595 melting point (gray form) 814 C (1,497 F) at 36 atmospheres pressure density (gray form) 5.73 g/cm3 at 14 C (57 F) (yellow form) 2.03 g/cm3 at 18 C (64 F) An atom of Arsenic in the gas phase, for As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. The valence electrons are leftover electrons that dont fill a shell or satisfy the octet rule (except for noble gases) or 18-electron rule (transition metals). If the element is in the fourth row of the periodic table, it is in period four. As is the chemical symbol for the element arsenic. Viewed 15k times. Melting point The temperature at which the solidliquid phase change occurs. 70. Europiumis a chemical element withatomic number63which means there are 63 protons and 63 electrons in the atomic structure. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Kryptonis a chemical element withatomic number36which means there are 36 protons and 36 electrons in the atomic structure. Its properties are thus intermediate between those of chlorine and iodine. its 3d orbital is completely filled. Chemically, indium is similar to gallium and thallium. Uranium is a silvery-white metal in the actinide series of the periodic table. High = substitution not possible or very difficult. Arsenic is in the fourth period of the periodic table, so the preceding noble gas is argon. It provides a measure of how difficult it is to extend a material, with a value given by the ratio of tensile strength to tensile strain. Group Posts. In a neutral atom, the number of electrons equals the number of protons, which means that neutral arsenic atoms have 33 electrons. Neptunium metal is silvery and tarnishes when exposed to air. The bulk properties of astatine are not known with any certainty. Since the atom is neutral, #Sb#s electron configuration must account for 51 electrons. In Victorian times, Dr Fowlers Solution (potassium arsenate dissolved in water) was a popular cure-all tonic that was even used by Charles Dickens. Tellurium is chemically related to selenium and sulfur. Potassiumis a chemical element withatomic number19which means there are 19 protons and 19 electrons in the atomic structure. This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site. Thechemical symbolfor Osmium isOs. Krypton is a member of group 18 (noble gases) elements. Look up properties, history, uses, and more. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Arsenic [Ar] 3d 10 4s 2 4p 3. atomic number 33 atomic weight 74.921595 melting point (gray form) 814 C (1,497 F) at 36 atmospheres pressure density (gray form) 5.73 g/cm3 at 14 C (57 F) (yellow form) 2.03 g/cm3 at 18 C (64 F) It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. 2. This equilibrium also known as samarium 149 reservoir, since all of this promethium must undergo a decay to samarium. Lawrenciumis a chemical element withatomic number103which means there are 103 protons and 103 electrons in the atomic structure. Medium = substitution is possible but there may be an economic and/or performance impact Description. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. Now the first noble state seems to be the same as his normal configuration and the latter seems to have equal electrons but divided in another way. Group of Source (s): electron configurations noble gas notation: https://tr.im/9Sybt. We can use noble gas notation to save us some time so we're saying the electron configuration is the same as neon. By mass, aluminium makes up about 8% of the Earths crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. By 1993 it was discovered that arsenic was present in these wells. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. I'm Chris Smith, thank you for listening and goodbye. Phosphorusis a chemical element withatomic number15which means there are 15 protons and 15 electrons in the atomic structure. Ceriumis a chemical element withatomic number58which means there are 58 protons and 58 electrons in the atomic structure. Carbon isn't a metalloid because despite the semiconductor properties of graphite all of its allotropes from graphite to diamond are non-metallic in character. 1s22s22p63s23p63d104s24p3. Franciumis a chemical element withatomic number87which means there are 87 protons and 87 electrons in the atomic structure. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. All such documents and related graphics are provided "as is" without any representation or endorsement made and warranty of any kind, whether expressed or implied, including but not limited to the implied warranties of fitness for a particular purpose, non-infringement, compatibility, security and accuracy. WebThis problem has been solved! Cadmiumis a chemical element withatomic number48which means there are 48 protons and 48 electrons in the atomic structure. Now sometimes the noble state is written as $\ce { [Ar] 3d^10 4s^1}$ or as $\ce { [Ar] 4s^2 3d^9}$. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. The period of an element is the horizontal row that the element is located in. Murray Robertson is the artist behind the images which make up Visual Elements. Total Cards. Apologies, we are having some trouble retrieving data from our servers Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. Electronegativity (Pauling scale)The tendency of an atom to attract electrons towards itself, expressed on a relative scale. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. and Gay-Lussac, L.-J. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Ghring, Otto and Fajans, Kasimir. A noble gas core is the noble gas element symbol enclosed in brackets: [He], [Ne], [Ar], [Kr], [Xe], or [Rn]. Thechemical symbolfor Gallium isGa. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Thechemical symbolfor Krypton isKr. Radonis a chemical element withatomic number86which means there are 86 protons and 86 electrons in the atomic structure. Se: Definition. This is approximately the sum of the number of protons and neutrons in the nucleus. The temperature at which the liquidgas phase change occurs. Siliconis a chemical element withatomic number14which means there are 14 protons and 14 electrons in the atomic structure. Arsenic is a chemical element with atomic number 33 which means there are 33 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary Title. Thechemical symbolfor Aluminum isAl. You may not further copy, alter, distribute or otherwise use any of the materials from this Site without the advance, written consent of the RSC. Thechemical symbolfor Carbon isC. It is nonmetallic and tetravalentmaking four electrons available to form covalent chemical bonds. Thechemical symbolfor Gadolinium isGd. Thechemical symbolfor Arsenic isAs. Thechemical symbolfor Einsteinium isEs. National Library of Medicine. WebExpert Answer Q.1 electronic Configuration of arsenic ,As (Z=33) 1s22s22p63s23p64s23d104p3 Noble gas notation is [Ar] 4s23 View the full answer Transcribed image text: Be sure to answer all parts. WebNeon 3s1 is our noble gas notation for sodium. this notation can become lengthy and so an abbreviated notation is used. WebThis problem has been solved! Write the electron configuration for arsenic. Members of a group typically have similar properties and electron configurations in their outer shell. What are some examples of electron configurations? Arsenic does not have any valence electrons in the 3d orbital because its 3d orbital is completely filled. What is the electron configuration for a sodium ion? Groundwater contamination of geogenic arsenic (As) remains a global health threat, particularly in south-east Asia. These are where s electrons come in, and in the fourth period they are 4s electrons. WebNeon 3s1 is our noble gas notation for sodium. Thechemical symbolfor Niobium isNb. Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. Let's do this for arsenic, and you should have a Periodic Table handy. Poloniumis a chemical element withatomic number84which means there are 84 protons and 84 electrons in the atomic structure. Sodium is a soft, silvery-white, highly reactive metal. The prominent correlation often observed between high As concentrations and methane (CH 4) stimulated the analysis of the gas dynamics in an As contaminated aquifer, whereby noble and reactive gases were analysed.Results The Noble Gas Notation for Argon is (Ne) 3s2 3p6 The Electron Configuration of Argon __ 1s2 2s2 2p6 3s2 3p6 __ or __ (Ne) 3s2 3p6 __ is also represened as (Ar) As a result of a full shell, the noble gases can be used in conjunction with the electron configuration notation to form the noble gas notation. Radon is a radioactive, colorless, odorless, tasteless noble gas. WebChemical element, Arsenic, information from authoritative sources. The noble gas configuration of nitrogen is: [He]2s22p3 . Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. Tinis a chemical element withatomic number50which means there are 50 protons and 50 electrons in the atomic structure. This is a way of writing an abbreviated electron configuration, with the noble gas substituting the beginning energy levels and orbital-filled shells. WebA noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons. Medium = substitution is possible but there may be an economic and/or performance impact, Low = substitution is possible with little or no economic and/or performance impact, If you wish to use the Images in a manner not permitted by these terms and conditions please contact the Publishing Services Department. The configuration of these electrons follows from the principles of quantum mechanics. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. WebThe arrangements of electrons above the last (closed shell) noble gas. CAS number its 3d orbital is completely filled. Noble gas which lies before this element is Neon (Ne). Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Thechemical symbolfor Titanium isTi. Lawrencium is the final member of the actinide series. The World Health Organization report that arsenic in drinking water could end up causing between 200,000 to 270,000 deaths in Bangladesh from cancer. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jns Jacob/Klaproth, Martin Heinrich. Arsenic is used as a doping agent in semiconductors (gallium arsenide) for solid-state devices. Total Cards. National Institutes of Health. Now the first noble state seems to be the same as his normal configuration and the latter seems to have equal electrons but divided in another way. WebArsenic - Element information, properties and uses | Periodic Table < Move to Germanium Move to Selenium > Arsenic As Arsenic 33 74.922 Fact box Uses and properties History Atomic data Bond enthalpies Oxidation states and isotopes Supply risk Pressure and temperature data advanced Podcasts Video References About. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. It is a soft, silvery-white alkali metal. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. We hope that you enjoy your visit to this Site. Xenonis a chemical element withatomic number54which means there are 54 protons and 54 electrons in the atomic structure. Silveris a chemical element withatomic number47which means there are 47 protons and 47 electrons in the atomic structure. Noble Gas Notation. Este site coleta cookies para oferecer uma melhor experincia ao usurio. A measure of how difficult it is to compress a substance. The total number of electrons in arsenic is thirty-three. Subject. Hafniumis a chemical element withatomic number72which means there are 72 protons and 72 electrons in the atomic structure. Elements are organised into blocks by the orbital type in which the outer electrons are found. Term. Thechemical symbolfor Sodium isNa. How many unpaired electrons are there in an atom of arsenic in the ground state? Xenon is a colorless, dense, odorless noble gas found in the Earths atmosphere in trace amounts. Terbiumis a chemical element withatomic number65which means there are 65 protons and 65 electrons in the atomic structure. atomic number = 13total number of electron = 13nable gas which is found before Advertisement Advertisement Boiling point Elemental sulfur is a bright yellow crystalline solid at room temperature. The temperature at which the liquidgas phase change occurs. Thechemical symbolfor Boron isB. All of its isotopes are radioactive. Details. Krypton is a member of group 18 (noble gases) elements. Description. Actinium is a soft, silvery-white radioactive metal. Tin is a post-transition metal in group 14 of the periodic table. Berylliumis a chemical element withatomic number4which means there are 4 protons and 4 electrons in the atomic structure. Stoner, E.C. Most metalloids occur in several forms or allotropes where one might seem metallic while another one seems non-metallic. Some foods, such as prawns, contain a surprising amount of arsenic in a less harmful, organic form. Thechemical symbolfor Polonium isPo. Neonis a chemical element withatomic number10which means there are 10 protons and 10 electrons in the atomic structure. Let's just do another element in the third period. The most common arsenic-containing mineral is arsenopyrite. So for sodium, we make the substitution of [Ne] for the 1 s2 2 s2 2 p6 part of the configuration. What is the electron configuration for a nitride ion? If you wish to use the Images in a manner not permitted by these terms and conditions please contact the Publishing Services Department by email. Thechemical symbolfor Iridium isIr. WebThe arrangements of electrons above the last (closed shell) noble gas. Se: Definition. 2019 periodic-table.org / see alsowww.nuclear-power.net. Now sometimes the noble state is written as $\ce { [Ar] 3d^10 4s^1}$ or as $\ce { [Ar] 4s^2 3d^9}$. National Center for Biotechnology Information. Boiling point The temperature at which the liquidgas phase change occurs. its 3d orbital is completely filled. 37. High = substitution not possible or very difficult. Seleniumis a chemical element withatomic number34which means there are 34 protons and 34 electrons in the atomic structure. around the world. A chemical symbol is a notation of one or two letters representing a chemical element. Thechemical symbolfor Beryllium isBe. Thechemical symbolfor Calcium isCa. WebBecause the third energy level has eight electrons and is therefore full (3s 2 3p 6) it is called a noble gas. Shorthand notation Uses the noble gas of the previous line. 2) Now you basically count blocks of elements in the Periodic Table from the noble gas up Electron configuration of Arsenic is [Ar] 3d10 4s2 4p3. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Arsenic is a chemical element with atomic number 33 which means there are 33 protons in its nucleus. WebThe noble gas notation for the electron configuration of arsenic is [Ar] 4s2. Term. Einsteiniumis a chemical element withatomic number99which means there are 99 protons and 99 electrons in the atomic structure. Rayner-Canham, Geoff; Overton, Tina (2014). Our videos prepare you to succeed in your college classes. Actiniumis a chemical element withatomic number89which means there are 89 protons and 89 electrons in the atomic structure. Covalent radiusHalf of the distance between two atoms within a single covalent bond. The description of the element in its natural form. 2. 3d10. But about 30 years ago they started getting water from wells. Neon has 10 electrons, rest 3 electrons are filled in 3s and 3p sub-shells. Thechemical symbolfor Copper isCu. Neptunium is the first transuranic element. Promethiumis a chemical element withatomic number61which means there are 61 protons and 61 electrons in the atomic structure. Thechemical symbolfor Nitrogen isN. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earths atmosphere. Gadoliniumis a chemical element withatomic number64which means there are 64 protons and 64 electrons in the atomic structure. Search PubChem. A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons.Noble Gas Configuration. Strontiumis a chemical element withatomic number38which means there are 38 protons and 38 electrons in the atomic structure. Boiling point The temperature at which the liquidgas phase change occurs. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons.Noble Gas Configuration. They are helium, neon, argon, krypton, xenon, and radon. What is the noble gas notation for nitrogen? The images may not be posted on any website, shared in any disc library, image storage mechanism, network system or similar arrangement. Chemistry. Density is the mass of a substance that would fill 1 cm. Local populations used to get their drinking water from open sources like ponds. It is the fifth most abundant element in Earths crust and the third most abundant metal, after iron and aluminium. This is due to the fact that all the orbitals up to that noble gas are completely filled. Arsenic - Electron Configuration and Oxidation States - As. In a neutral atom, the number of electrons equals the number of protons, which means that neutral arsenic atoms have 33 electrons. Others include realgar, orpiment and enargite. Thechemical symbolfor Rhodium isRh. In a neutral atom, the number of electrons equals the number of protons, which means that neutral arsenic atoms have 33 electrons. Ironis a chemical element withatomic number26which means there are 26 protons and 26 electrons in the atomic structure. There's a particular problem in Bangladesh, rising arsenic levels there followed what was supposed to be an improvement to the water supply. Give the electronic configuration for arsenic and then convert it to noble gas notation. WebArsenic is explanation: To write the electronic configuration of the elements in the noble gas notation, first counts the total number of electrons and then write the noble gas that is located in front of the same element . Fermiumis a chemical element withatomic number100which means there are 100 protons and 100 electrons in the atomic structure. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Silicon has an electron configuration of 1s2 2s2 2p6 3s2 3p2. Oxygenis a chemical element withatomic number8which means there are 8 protons and 8 electrons in the atomic structure. Bromine [Ar] 3d 10 4s 2 4p 5. Caesiumis a chemical element withatomic number55which means there are 55 protons and 55 electrons in the atomic structure. The percentage of a commodity which is recycled. 83.79 amu. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. It's a shame because it might have been rather useful if it was. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. Rheniumis a chemical element withatomic number75which means there are 75 protons and 75 electrons in the atomic structure. Follow the Aufbau rule and write the full electron configuration. Noble gas which lies before this element is Neon (Ne). The total number of electrons in arsenic is thirty-three. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Iridiumis a chemical element withatomic number77which means there are 77 protons and 77 electrons in the atomic structure. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Atomic number The Cookies Statement is part of our Privacy Policy. Thechemical symbolfor Sulfur isS. Sulfur is abundant, multivalent, and nonmetallic. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). WebUsing the noble gas notation, write the electron configuration for the silicon atom. Titanium can be used in surface condensers. Berkelium is a member of the actinide and transuranium element series. A horizontal row in the periodic table. Write out the electron configuration for arsenic (As). Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrs Manuel (1801) and Sefstrm, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-mile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segr, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Mller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. In the periodic table of elements, silicon is represented by the chemical symbol Si, atomic number 14 and relative atomic mass of 28.085. What is the electron configuration of chromium? Video: Argon Electron Configuration Notation The configuration notation provides an easy way for scientists to write and communicate how electrons are arranged around the nucleus of an atom. Platinum is one of the least reactive metals. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. Tungstenis a chemical element withatomic number74which means there are 74 protons and 74 electrons in the atomic structure. WebNoble Gas Notation: Noble gas notation is a simplified expression of the electron configuration for an atom. it only contains enough electrons to fill the 2s orbital. Calciumis a chemical element withatomic number20which means there are 20 protons and 20 electrons in the atomic structure. The Greek philosopher Theophrastus knew of two arsenic sulfide minerals: orpiment (As, A more dangerous form of arsenic, called white arsenic, has also been long known. The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases. Thechemical symbolfor Chromium isCr. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in Title. Why is noble gas configuration used? Aluminumis a chemical element withatomic number13which means there are 13 protons and 13 electrons in the atomic structure. Let's just go all the way over here to aluminum. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Bromine [Ar] 3d 10 4s 2 4p 5. A noble gas Nickelis a chemical element withatomic number28which means there are 28 protons and 28 electrons in the atomic structure. Chemical symbol for Arsenic is As. A measure of how difficult it is to deform a material. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). arsenic (As), a chemical element in the nitrogen group (Group 15 [Va] of the periodic table), existing in both gray and yellow crystalline forms. About. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Using the noble gas notation, the electron configuration of silicon can be denoted by Ne 3s 2 3p 2. Welcome to "A Visual Interpretation of The Table of Elements", the most striking version of the periodic table on the web. Chemistry. The period of an element is the horizontal row that the element is located in. Chemical element Arsenic has atomic number 33. Al: [Ar]3s23p1 [He]2s22p63s23p1 [Ne]3s23p1 [Ne]3s23p2 2 See answers Advertisement Advertisement JaeFrench2004 JaeFrench2004 Answer: C. Explanation: [Ne]3s23p1. Thechemical symbolfor Terbium isTb. Arsenic is a chemical element with atomic number 33 which means there are 33 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary Question: Write the electron configuration for arsenic. Indiumis a chemical element withatomic number49which means there are 49 protons and 49 electrons in the atomic structure. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys.