Arsenic

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Arsenic is a chemical element, having the chemical symbol As.

Arsenic
74.92160(2)



  As
33
[Ar] 4s2 3d10 4p3
[ ? ] Metalloid:

Its atomic number (the number of protons) is 33. It has a Standard Atomic Weight of 74.92160(2), and is typically found as a solid in its elemental form.

Arsenic is considered to be a member of the "Metalloid" class of elements, has a boiling point of 613 °C (sublimation point at atmospheric pressure of 1 atm) , and a melting point of 817 °C (at atmospheric pressure of 28 atm) .

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