Question

Arsenic does not have any valence electrons in the 3d orbital because

(A) its 3d orbital is completely filled.

(B) it only contains enough electrons to fill the 2s orbital.

(C) it is an inert substance that is not reactive.

(D) all of its valence electrons are in the 3p orbital.

Answer 1

(a)its 3d orbital is completely filled.

Step-by-step explanation:

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Answer 2

Answer : Option A) its 3d orbital is completely filled.

Explanation : Arsenic does not have any valence electrons in the 3d orbital because it's 3d orbital is completely filled.

Arsenic has atomic number as 33 and the electron configuration is
`[Ar] 3d^(10) 4s^(2) 4p^(3)`. It clearly shows that the 3d orbital is completely filled which does not has space to accommodate any electrons in the 3d orbital. Therefore, the electrons are accommodated in 4s and 4p orbitals,