Francium is highly radioactive; its longest lived isot - Exam Yatra

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SSC JE CE 2016 Set 1 (Non Technical)
General Intelligence and Reasoning
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General Intelligence and Reasoning

85

M: +1.00/-0.25

Francium is highly radioactive; its longest lived isotope²²³Fr has a half life of only _____________.

[SSC JE CE 2016 Set 1 (Non Technical)]

A 2.1 seconds

B 21 seconds

C 2.1 minutes

D 21 minutes

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