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a_sh-v [17]
4 years ago
8

I need help answering this ASAP please!

Mathematics
1 answer:
mariarad [96]4 years ago
8 0

Answer:

  ≈ 16 g

Step-by-step explanation:

Half life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half of its initial mass.

Therefore;

New mass = Original mass × (1/2)^n, where n is the number of half lives

Thus;

New mass = 125 × (1/2)³

                  = 125/8

                   = 15.625

                   ≈ 16 g

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