1 mg radium has 2.68 × 10 18 atoms. Its half life is 1620 years. How many radium atoms…

Physics · Class 12 · CBSE — Nuclei

1. 2.01 × 10⁹
2. 2.01 × 10¹⁸
3. 1.01 × 10⁹
4. 1.01 × 10¹⁸

Answer

(B) 2.01 × 10 18

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