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coralaguilar1702
13.01.2021 •
Chemistry
Suppose 128 radioactive atoms have a half-life of 15 seconds. Approximately how many radioactive atoms will be left after 60 seconds
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Ответ:
8 electrons
Explanation:
Number of atoms = 128
Half life = 15 s
After each half life, the number of atoms reduces by half. So we need to determine how many half lives are in 60s.
Number of half lives = 60s / 15s = 4
After the first life;
Number of electrons left = 128 / 2 = 64
After the second life;
Number of electrons left = 64 / 2 = 32
After the third half life;
Number of electrons left = 32 / 2 = 16
After the fourth half life;
Number of electrons left = 16 / 2 = 8
Ответ:
The answer is an ionic bond