Question: As a health physicist, you are being consulted about a spill in a radiochemistry lab. The isotope spilled was 500Ci of 131Ba, which has a

As a health physicist, you are being consulted about a spill in a radiochemistry lab. The isotope spilled was 500µCi of 131Ba, which has a half-life of 12 days.
(a) What mass of 131Ba was spilled?
(b) Your recommendation is to clear the lab until the radiation level has fallen 1.00µCi. How long will the lab have to be closed?

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