PLEASE EXPLAIN AND SHOW WORK. Thank You. Answer is already shown. There are 64 g

Question

PLEASE EXPLAIN AND SHOW WORK. Thank You. Answer is already shown.

There are 64 grams of a radioactive element: 218 84 Po. How much is left after 3 half - lives? 61 g 32 g 21 g 8 g none If the sample goes through alpha decay, what is the other product? If the original sample goes through beta decay instead, what is the other product? In either decay, what is true about the nucleon number during the process? The total nucleon number increases during the decay. The total nucleon number decreases during the decay. The total nucleon number stays the same during the decay

Explanation / Answer

25) after 3 half lives lose 2^(-3) = 1/8
so 64/8 = 8g so d)

26)
alpha is 4 He 2
so 218-4 = 214
84-2 = 82

so 214 Pb 82

27) beta decay is n-> p

so 218 At 85 so e)

28) total nuclean stays the same c)

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