Question

What is the quantum mechanical electron configuration of arsenic?

Answer 1

Answer:

After the 4s sublevel is filled with two electrons, ten electrons fill the 3d sublevel, which is slightly higher in energy than the 4s sublevel. After the 3d sublevel is filled, the remaining three electrons will be in orbitals in the 4p sublevel. Thus, the electron configuration for arsenic is [Ar] 4s(2 squared) 3d(10 squared) 4p(3 squared).

Answer 2

Electron configuration of Arsenic is [Ar] 3d10 4s2 4p3. Possible oxidation states are +3,5/-3.
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