Question

An element has the electronic configuration 1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},
3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},\,4{{s}^{1}}
. It is a
A) s-block element B) p-block element C) d-block element D) Inert gas

Answer 1

inert gas is the answer