Name the compound `CH_3 - CH_2 - CH_2 - CH_3`

Explanation

To name the compound `CH₃ - CH₂ - CH₂ - CH₃`, we can follow these steps:

### Step 1: Count the number of carbon atoms
In the given compound, we can see that there are four carbon atoms present in the chain. This can be observed from the structure:
- `CH₃` (1 carbon)
- `CH₂` (2nd carbon)
- `CH₂` (3rd carbon)
- `CH₃` (4th carbon)
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