Question

a sample of starts with a 1000 radio active atoms how many half lives have elapsed when when 750 atoms have decayed ?
options are
0.25
1.5
2.0
2.5

Answer 1

Answer:

answer is 2.5 I think

mark me braillist

Answer 2

Answer:

0.193 half-life will pa.ss.

Explanation:

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