# Problem: Radioactive copper-64 decays with a half-life of 12.8 days.b. A sample contains 28.0 mg 64Cu. How many decay events will be produced in the first second? Assume the atomic mass of 64Cu is 64.0 u.

2.635×1020

###### Problem Details

Radioactive copper-64 decays with a half-life of 12.8 days.

b. A sample contains 28.0 mg 64Cu. How many decay events will be produced in the first second? Assume the atomic mass of 64Cu is 64.0 u.