Chemistry, 28.10.2020 22:00, Yehh7630

If the activity of a sample of 232Th decreases from 1000 cpm to 500 cpm in 60 min, in another 60 min its activity will be O O cpm.
500 cpm.
O 125 cpm.
0 250 cpm.

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If the activity of a sample of 232Th decreases from 1000 cpm to 500 cpm in 60 min, in another 60 min...