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20 May, 11:42

Nickel 63 half life of 92 years. how much nickel 63 world reamin in a sample containing 20 micrograms of nickle 63 at the end of 184 years

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  1. 20 May, 13:34
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    184:92 = 2 half lives.

    Initial mass of Ni is 20 micrograms (μg).

    After one half-life 20*1/2=10 μg remain,

    after second half-life 10*1/2 = 5 μg remain.

    So, after 184 years 5 μg of Ni-63 remain.
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