An alkene has 5 carbon atoms. The number of hydrogen atoms in it is

Options

A. 2
B. 4
C. 8
D. 10

Explanation

To find the number of hydrogen atoms in an alkene with 5 carbon atoms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand what an alkene is**: An alkene is a type of hydrocarbon that contains at least one double bond between carbon atoms.

2. **Know the general formula for alkenes**: The general formula for alkenes is given by \( C_nH_{2n} \), where \( n \) is the number of carbon atoms.

3. **Identify the number of carbon atoms**: In this case, we have \( n = 5 \) because the alkene has 5 carbon atoms.

4. **Substitute the value of \( n \) into the formula**:
\[ H = 2n = 2 \times 5 \]

5. **Calculate the number of hydrogen atoms**:
\[ H = 10 \]

6. **Conclusion**: Therefore, the number of hydrogen atoms in an alkene with 5 carbon atoms is 10.

### Final Answer:
The number of hydrogen atoms in the alkene is **10**.