Question

The co valency of nitrogen in ammonium ion is ________.

• A. $3$
• B. $4$
• C. $5$
• D. $2$

Answer 1

The correct option is B

$4$

Explanation for Correct option: B) $4$

Covalency is the number of electrons shared by the central atom in a molecule or ion. In Ammonium ion($N{H_4}^{+}$), N bonds by sharing electrons with four H atoms.Hence, the covalency of N is $4$

Explanation for Incorrect options:

A) $3$- N shows covalency of $3$ in Ammonia molecule($N{H}_3$)

C) $5$- N cannot show a covalency of $5$ as it cannot bear positive charge due to its small size and high electronegativity.

D) $2$- N shows covalency of $2$ in oxides of Nitrogen ($NO$)

Hence, A) is the correct option- N shows covalency of $4$ in $N{H_4}^{+}$