The hybridization of NH₄⁺ ion is:

• A. sp
• B. sp²
• C. sp³
• D. sp³d

The hybridization of the ammonium ion (NH₄⁺) is an important concept in chemistry. To determine the hybridization, we can look at the structure of the ion.

Understanding NH₄⁺ Structure

The ammonium ion consists of one nitrogen atom bonded to four hydrogen atoms. This results in a total of four bonding pairs of electrons around the nitrogen atom.

Determining Hybridization

To find the hybridization, we can use the formula:

• Count the number of bonded atoms (4 hydrogen atoms).
• Since there are no lone pairs on the nitrogen atom, we only consider the bonding pairs.

Conclusion on Hybridization Type

With four bonding pairs, the hybridization of NH₄⁺ is sp³. This means the nitrogen atom undergoes sp³ hybridization, resulting in a tetrahedral geometry.

Therefore, the correct answer is C. sp³.