Group displacement law was given by

Options

A. Beequerel
B. Rutherford
C. Mendeleef
D. Soddy and Fazan

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks who proposed the Group Displacement Law in nuclear chemistry.

2. **Recall the Options**: The options given are Becquerel, Rosercord, Mendeleev, and Saadi Fasan.

3. **Review the Information**: The Group Displacement Law states that when a radioactive nucleus emits particles, the atomic and mass numbers of the resulting element change. Specifically:
- When an alpha particle is emitted, the atomic number decreases by 2 and the mass number decreases by 4.
- When a beta particle is emitted, the atomic number increases by 1, while the mass number remains unchanged.

4. **Identify the Correct Answer**: According to the information provided in the video transcript, the Group Displacement Law was given by Saadi Fasan.

5. **Conclusion**: Therefore, the correct answer to the question is Saadi Fasan.

**Final Answer**: The Group Displacement Law was given by Saadi Fasan.

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