The half life of a radioactive element M is 30 min. How many atoms of A will be left after 2 h if there is 64 atoms of M in the beginning? Options: A. 4 , B. 64, C. 0, D. Can't say.

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Nagaraj Ramamurthy

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A 4
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Brain Trainer

Answer is A. 4
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it will be 8 . or D.
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Get mentored by science olympiad topper.

Yeah a.4 is correct its eqaul to 4 half life's.so 64/2^4 I.e 64/16 is equal to 4
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Math Magician

A
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M.SC(MATHS),M.ED, (MBA)

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Biotech the future World

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Btech (Ece),mtech

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A.4
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