A sample of radioactive material consists of 200 g of nuclide P and 100 g of nuclide Q.
Nuclide P has a half-life of 2 days and nuclide Q has a half-life of 4 days.
What is the total mass of nuclides P and Q after 12 days?
1 )
3.1 g
2 )
12.5 g
15.6 g
4 )
18.8 g
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