3)
A radioactive isotope of potassium (K) has a half-life of 20 minutes. If a 40.0 gram sampl...
Mathematics, 21.03.2020 02:17 daniellecraig77
3)
A radioactive isotope of potassium (K) has a half-life of 20 minutes. If a 40.0 gram sample of this isotope is allowed to decay for 80 minutes, how many grams of the radioactive isotope will remain?
A) 2.5 grams
B) 5.0 grams
C) 10.0 grams
D) 40.0 grams
Answers: 2
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