Arsenic (symbol As) is element number 33 of the periodic table and belongs to the “Metalloid” category. Its atomic mass is about 74.922, and its phase under standard conditions is Solid. This element sits in period 4 and group 15 of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 5. The short electron configuration of Arsenic is [Ar] 3d¹⁰ 4s² 4p³. Known uses of Arsenic include Insecticide, Lead alloys and Semiconductors.
The electron configuration of Arsenic (As), with 33 electrons, is shown below. The last shell (shell 4) is highlighted:
Distribution of 33 electrons of Arsenic across shells K to N:
The metalloids have properties between metals and nonmetals, and many of them are semiconductors.
The atomic number of Arsenic (As) is 33; that is, every atom of it has 33 protons.
The electron configuration of Arsenic (As) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p³; in short form it is [Ar] 3d¹⁰ 4s² 4p³, and its last shell is 4s² 4p³.
The chemical symbol of Arsenic is As.
Arsenic is located in period 4 and group 15 and belongs to the “Metalloid” category.
The atomic mass of Arsenic is about 74.922 (atomic mass units).
The phase of Arsenic under standard conditions is Solid.
Uses of Arsenic include Insecticide, Lead alloys and Semiconductors.
Arsenic was discovered by Albertus Magnus in 1250.
Boron (B)Silicon (Si)Germanium (Ge)Antimony (Sb)Tellurium (Te)
Nitrogen (N)Phosphorus (P)Antimony (Sb)Bismuth (Bi)Moscovium (Mc)
