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Technitium - 9 9 has a half life of 6 . 0 hours. If a payient is givem 1 2 0 mg how many half

Technitium

- 99

has a half life of

6.0

hours. If a payient is givem

120

mg how many half lives does it take to drop to less than

0.5

?

How much time in days did this require?

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