Question

Which of the following element will form most stable bivalent anion?

• A. Fluorine
• B. Oxygen
• C. Chlorine
• D. Nitrogen

Answer 1

The correct option is B Oxygen

(A) Fluorine with electronic configuration $1s^{2}2s^2{p}^5$ will form a most stable monovalent anion.
(B) Oxygen with electronic configuration $1s^{2}2s^2{p}^4$ will form a most stable bivalent anion.
(C) Chlorine with electronic configuration $1s^{2}2s^2{p}^{6}3s^{2}3p^5$ will form a most stable monovalent anion.
(D) Nitrogen with electronic configuration $1s^{2}2s^2{p}^3$ will form a most stable trivalent anion.