The Cadmium isotope 109Cd is radioactive. A sample begins decay with 1012 Cd atoms. After 500...
The Cadmium isotope 109Cd is radioactive. A sample begins decay with 1012 Cd atoms. After 500 days, 4.7 x 1011 atoms remain. What is the half-life of this sample?
(a) 46 days
(b) 102 days
(c) 459 days -- right answer but not sure how to get it
(d) 662 days
(e) none of the above
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The Cadmium isotope 109Cd is radioactive. A sample
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