Question

Which of the following is the correct condensed electron configuration for the atom or ion indicated?

            a) The electron configuration of Cu is [Ar]4s²3d⁹.

            b) The electron configuration of Si⁴⁺ is [Ar].

            c) The electron configuration of Cl⁺ is [Ar].

            d) The electron configuration of In³⁺ is [Kr]4d¹⁰.

            e) The electron configuration of V is [Ar]4s²4d³.

Answer 1

a)
The electron configuration of Cu is [Ar] 3d10 4s1
Here d orbital will fill first to get fully filled d orbitals

b)
The electron configuration of Si is [Ne] 3s2 3p2
To get Si4+ it must loose 4 electrons.
so,
The electron configuration of Si4+ will be [Ne]

c)
The electron configuration of Cl is [Ne] 3s2 3p5
To get Cl+ it must loose 1 electron
so,
The electron configuration of Cl+ will be [Ne] 3s2 3p4

d)
The electronic configuration of In is [Kr] 4d10 5s2 5p1
To get In3+, it must loose 3 electrons
The electronic configuration of In3+ will be [Kr] 4d10

e)
The electron configuration of V is Ar 3d3 4s2

Answer: d and e