Arsenic Element in Periodic Table | Atomic Number Atomic Mass
Arsenic is a chemical element and it is a member of group 15 and period 4 in the periodic table. Atomic number of Arsenic is 33 and it is indicated by the symbol is As. It belongs to the nitrogen family. Phosphorous, Antimony, Bismuth and Moscovium are the other elements in the nitrogen family. 'As' occurs rarely as a pure element. It is found as a compound. The most common ores of 'As' are arsenopyrite (FeAsS), realgar (As 4 S 4) and orpiment (As 2 S 3). These compounds are obtained as a by-product of the mining and purification of silver metal.
Uses Of Arsenic Element:
- 'As' is a poison. It is used as rat poisons and insecticides.
- 'As' used as a doping agent for solid state devices such as transistors.
- It is also used to make special glass and preserve wood.
- Gallium arsenide is used to make Light-emitting diodes.
Arsenic Element Information:
Discovery year:800 CE
Atomic number: 33
Relative atomic mass: 74.922
Electron configuration: [Ar] 3d10 4s2 4p3
Other elements in the same block:
Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Gallium, Germanium, Selenium, Bromine, Krypton, Indium, Tin, Antimony, Tellurium, Iodine, Xenon, Thallium, Lead, Bismuth, Polonium, Astatine, Radon, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine and Oganesson are the same block elements.
Period: period 4
Other elements in the same period:
Group: group 15 (pnictogens)
Other elements in the same group:
Other elements in the same orbital:
Allotropes: grey, yellow, black
Key isotopes: 75As
Melting point: Sublimes at 616°C, 1141°F, 889 K
Boiling point: Sublimes at 616°C, 1141°F, 889 K
Element category: metalloid
Density (g cm−3): 5.75
CAS number: 7440-38-2
Color: metallic grey
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