Q. What is the half life of the longest lived isotope of Francium?

  • (A) 1 minute
  • (B) 21 minute
  • (C) 21 hours
  • (D) 100 days
✅ Correct Answer: (B) 21 minute

Published by Mr. Dubey ⭐ 104.99K Points at 19-Nov-2021 07:31 pm in Chemistry

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