Account for the following:
The structure of `NH_3` is pyramidal.

Explanation

To account for the pyramidal structure of ammonia (NH₃), we can follow these steps:

### Step 1: Determine the Lewis Structure of NH₃
- Ammonia (NH₃) consists of one nitrogen atom and three hydrogen atoms. The nitrogen atom has five valence electrons, and each hydrogen atom has one valence electron.
- In total, NH₃ has 5 (from N) + 3 (from H) = 8 valence electrons.
- The Lewis structure shows nitrogen in the center with three hydrogen atoms bonded to it, and one lone pair of electrons on nitrogen.

### Step 2: Count the Number of Sigma Bonds and Lone Pairs
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