Question- if the radioactive decay of a nucleus has a, Ask an Expert

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Question- If the radioactive decay of a nucleus has a half-life of 4.20 min, how many atoms are left after 3.00 × 102 seconds if there are 5.00 × 1022 atoms to start?

a) 3.46 × 109 atoms

b) 2.19 × 1022 atoms

c) 15.9 atoms

d) 3.94 atoms

Illustrate structures to prove your interpretation.

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