What is a homologous series of carbon compounds? Give an example and list its three characteristics.

Explanation

### Step-by-Step Solution:

**Step 1: Define Homologous Series**
A homologous series is a group of organic compounds that have the same functional group and similar chemical properties but differ from each other by a specific structural unit, typically a -CH2- group.

**Step 2: Provide an Example**
An example of a homologous series is the series of alkenes, which are hydrocarbons that contain at least one carbon-carbon double bond. The general formula for alkenes is CnH2n, where 'n' is the number of carbon atoms.

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