Question

What the covalency of phosphorous atom in excited state ?

• A. 3
• B. 4
• C. 5
• D. 1

Answer 1

The correct option is C 5

Nitrogen atoms can form up to four covalent bonds.In the ammonium ion($N{H}_4^{+}$), the nitrogen atom forms four covalent bonds, again filling the outermost orbital with eight electrons: Phosphorus can form up to five covalent bonds, as in phosphoric acid $\left(H_{3}P{O}_4\right)$.