Arsenic (As) Properties and Facts

Element 33 - Metalloid

What are the basic properties of Arsenic?

Arsenic (symbol: As) is a metalloid with atomic number 33. Its atomic mass is 74.922 u, and it belongs to period 4 and group 15.

What is the electron configuration of Arsenic?

The electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p³

What are the physical properties of Arsenic?

Melting point: 1090.0, K
Boiling point: 887.0 K
Density: 5.727 g/cm³

What are the known isotopes of Arsenic?

  • As-75: 100.0% abundance

What is the biological role and occurrence of Arsenic?

Biological role: Toxic, no known beneficial role
Natural occurrence: Found in arsenopyrite and other minerals

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