Question

Which among the following group 15 element forms most stable pentavalent compound?

• A. Phosphorus
• B. Antimony
• C. Bismuth
• D. Arsenic

Answer 1

The correct option is A Phosphorus

Phosphorus is a 15th group element and it forms the most stable pentavalent compound like $P_2{O}_5$. because available of d-electrons. Also, on moving down the group, the stability of the +5 oxidation state decreases.

Thus, phosphorus form the most stable pentavalent compounds.

Hence, the correct answer is option $A$.