The shape of `NH_(3)` is very similar to that of :

Options

A. `BH_(3)`
B. `CH_(3)^(-)`
C. `CH_(3)^(+)`
D. `SO_(4)^(2-)`

Explanation

To determine the shape of NH₃ (ammonia) and find a similar shape among the given options, we can follow these steps:

### Step 1: Understand the molecular geometry of NH₃
- NH₃ has one nitrogen atom bonded to three hydrogen atoms and has one lone pair of electrons on the nitrogen.
- The presence of the lone pair affects the geometry, leading to a trigonal pyramidal shape.

### Step 2: Identify the shape of other molecules
- **BH₃ (Boron Trifluoride)**: This molecule has three bonds and no lone pairs, resulting in a trigonal planar shape.
- **CH₃⁻ (Methyl Anion)**: This molecule has four bonds (three hydrogen and one carbon), and since it has no lone pairs, it adopts a tetrahedral shape. However, if we consider the lone pair on the carbon, it results in a pyramidal shape.
- **CH₃ (Methyl Radical)**: This molecule has three hydrogen atoms bonded to carbon and no lone pairs, resulting in a trigonal planar shape.
- **SO₄²⁻ (Sulfate Ion)**: This ion has four oxygen atoms bonded to a sulfur atom with no lone pairs, resulting in a tetrahedral shape.

### Step 3: Compare the shapes
- NH₃ has a trigonal pyramidal shape due to the lone pair.
- CH₃⁻ also has a pyramidal shape because of the presence of a lone pair on carbon.

### Step 4: Conclusion
- The shape of NH₃ is most similar to CH₃⁻, which is also pyramidal.

### Final Answer
The shape of NH₃ is very similar to CH₃⁻.

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