Match each molecule with its molecular geometry according to VSEPR theory:
`(a) NH_(4)^(+)" " (b) N_(3)^(-)" "(c) CO_(3)^(2-)" "(d) SO_(2)`
The choices are linear, angular, trigonal planar and tetrahedral.

Explanation

To match each molecule with its molecular geometry according to VSEPR theory, we will analyze each molecule step by step:

### Step 1: Analyze NH₄⁺ (Ammonium Ion)
1. **Valence Electrons**: Nitrogen has 5 valence electrons. Since NH₄⁺ has a positive charge, we subtract 1 electron, leaving us with 4 valence electrons.
2. **Bonding**: Each hydrogen atom contributes 1 electron, and since there are 4 hydrogen atoms, they form 4 single bonds with nitrogen.
3. **Lone Pairs**: There are no lone pairs on nitrogen.
4. **Steric Number**: The steric number is 4 (4 bond pairs + 0 lone pairs).
5. **Hybridization**: The hybridization is sp³.
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