Write two units for activity of radioactive element and relate them with number of disintegration per second.

Explanation

To solve the question, we will identify two units for the activity of a radioactive element and relate them to the number of disintegrations per second.

### Step-by-Step Solution:

1. **Identify the Units of Activity**:
- The first unit of activity is the **Becquerel (Bq)**.
- The second unit of activity is the **Curie (Ci)**.

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