State one safety precaution for each of the following:
in handling a radioactive source,

Explanation

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for one safety precaution for handling a radioactive source. It's important to recognize that handling radioactive materials requires strict safety measures to protect oneself from harmful radiation exposure.

2. **Identify Safety Precautions**: While the question specifies "one," it is useful to know multiple precautions to ensure comprehensive safety. Here are a few key safety precautions:

- **Wear Protective Clothing**: Always wear a lab coat or protective clothing to shield your skin from potential contamination. If there is a risk of serious contamination, consider wearing disposable clothing.

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