General Knowledge - Chemistry - Discussion

Nitrogen is not trivalent it's Pentavalent. But it uses its three electrons (of p-prbitals) for covalent bonding in NH3. And the fourth bond is Dative covalent formed by using of lone pair of N from (3s). After the formation of a coordinate covalent bond, it can also behave as a covalent bond due to having the same environment in ammonium ion. In this way, it forms 4 bonds.

Thanks @Naimish Kumar.

NH4+ is formed.

N can form 3 covalent bond, e.g. NH3 and 1 co-ordinate covalent bond e.g. NH4+, which is a type of covalent bond. So the answer is D.

N can form only 3 covalent bonds and the 4th bond that it forms is the co-ordinate covalent bond not covalent. So the right answer is 3.

Since valency if N is 3 so it should be 3.

The covalency of nitrogen is 4 i.e.it forms 3 normal covalent bonds and a co-ordinate covalent bond.

A coordinate covalent bond is one where both bonding electrons are from one of the atoms involved in the bond. These bonds give rise to Lewis acids and bases. The electrons are shared roughly equally between the atoms in contrast to ionic bonding.

Such bonding occurs in molecules such as the ammonium ion (NH4+) and are shown by an arrow pointing to the Lewis acid. Also known as non-polar covalent bond, the electronegativity of these bonds range from 0 to 0.3.

Nitrogen is trialing, so the answer is 3 and not 4.

NH4+ is formed.