Posted by
**Charleze** on
.

The half-life of Xe-133 is 126 hours. Starting with 250. mg, after 500 hours around how many mg remain?

A. 63

B. 16

C. 32

D. 125

Thursday

March 30, 2017
Posted by
**Charleze** on
.

The half-life of Xe-133 is 126 hours. Starting with 250. mg, after 500 hours around how many mg remain?

A. 63

B. 16

C. 32

D. 125

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