Atomic NumberAtomic Number of Arsenic
Atomic Number of Arsenic is 33.
Chemical symbol for Arsenic is As. Number of protons in Arsenic is 33. Atomic weight of Arsenic is 74.921595 u or g/mol. Melting point of Arsenic is 613 °C and its the boiling point is 613 (Subl.) °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Arsenic
Arsenic is a semi-metal and a chemical element known since the old times. It has got its name after the Greek word for orpiment. In very small amounts it can be found on the surface of earth, but generally it is obtained from minerals like arsenopyrite and others. It micro doses, arsenic is essential to all living things, but it is carcinogenic even in very low doses. This element can be found in some seafood like prawns. Some compounds of arsenic have very strong poisonous properties, and they are used as poison for rodents and insects. This chemical element has applications in medicine, mainly for its great toning properties. Arsenic also plays a role of semiconductor doping agent and is used in pyrotechnics, producing solid-state devices, and so on.
Uses of Arsenic
Arsenic, a silver-grey, semi-metal element with the symbol As, is used in semiconductors. And mostly used in alloying with lead. It can be employed with silicon and germanium. Elemental arsenic is mainly used in bronzing and pyrotechnics. Arsenious oxide, also known as white arsenic, is used in the manufacture of glass. Arsenic trioxide is employed as a precursor to forestry products as well as in electronics, paints and making glass. Arsenic compounds are used as wood preservatives. They also can be used in some medical applications and in agriculture too. Besides, they are preferred for military purposes. Arsine, an odorless, colorless, poisonous gas with the formula AsH3, employed as a doping agent for semiconductors.
Compounds with Arsenic
- As4O6: Arsenious oxide
- As2O3: Arsenic trioxide
- As2O5: Arsenic pentoxide
- GaAs: Gallium arsenide
- AsH3: Arsenic hydride (Arsine)
- H3AsO4: Arsenic acid
- PbHAsO4: Lead hydrogen arsenate
- [Ca3(AsO4)2]: Calcium arsenate
Properties of Arsenic Element
| Atomic Number (Z) | 33 |
|---|---|
| Atomic Symbol | As |
| Group | 15 |
| Period | 4 |
| Atomic Weight | 74.921595 u |
| Density | 5.776 g/cm3 |
| Melting Point (K) | 1090 K |
| Melting Point (℃) | 613 °C |
| Boiling Point (K) | 887 K |
| Boiling Point (℃) | 613 (Subl.) °C |
| Heat Capacity | 0.329 J/g · K |
| Abundance | 1.8 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Metalloid |
| Electronegativity (Pauling) χ | 2.18 |
| Ionization Energy (eV) | 9.7886 |
| Atomic Radius | 115pm |
| Covalent Radius | 119pm |
| Van der Waals Radius | 185 |
| Valence Electrons | 5 |
| Year of Discovery | ca. 1250 |
| Discoverer | Albertus Magnus |