nuclear……?
If 0.233 g of a radioisotope remained after four half-lives, then the original mass was _________ g.
please help
Tags: mass, Nuclear, radioisotope
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July 19th, 2010 at 11:45 am
This is just doubling 4 times (4 half lives)
Therefore 3.728 g
1.864 (1 hl)
.932 (2 hl)
.466 (3 hl)
.233 (4hl)
July 19th, 2010 at 12:12 pm
0.233 after 4 half lives
0.233 X 2 3 h l
.233 X2 X 2 2 hl
.233 X 2 X 2 X 2 1 hl
.233 X 16 original amount
So original amount is 3.728 grams