Name the element used in fuel cell for generating electricity.

Answer

**Step-by-Step Solution:**

1. **Understanding Fuel Cells:** Fuel cells are devices that convert chemical energy directly into electrical energy through a chemical reaction.

2. **Identifying the Key Elements:** The primary elements involved in a fuel cell are hydrogen and oxygen.

3. **Role of Hydrogen:** In a fuel cell, hydrogen serves as the fuel. It reacts with oxygen from the air.

4. **Chemical Reaction:** The reaction that takes place in a hydrogen fuel cell can be summarized as:
\[ 2H_2 + O_2 \rightarrow 2H_2O + \text{Electricity} + \text{Heat} \]
This indicates that when hydrogen (H₂) combines with oxygen (O₂), it produces water (H₂O), electricity, and heat.

5. **Conclusion:** Therefore, the element used in fuel cells for generating electricity is **Hydrogen**.

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