Write the IUPAC names of the following:
`CH_(3)-CH_(2)-CH=CH_(2)`

Explanation

To write the IUPAC name for the compound `CH₃-CH₂-CH=CH₂`, we can follow these steps:

### Step 1: Identify the longest carbon chain
The given structure is `CH₃-CH₂-CH=CH₂`. The longest continuous chain of carbon atoms contains 4 carbon atoms.

### Step 2: Number the carbon chain
We need to number the carbon atoms in such a way that the double bond gets the lowest possible number. Starting from the end of the chain closest to the double bond, we number the carbon atoms as follows:
1. CH₂ (1)
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