What is the half-life of Cadmium-109?

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Multiple Choice

What is the half-life of Cadmium-109?

Explanation:
Half-life is the time required for a radioactive amount to decay to half of its initial quantity. Cadmium-109 has a half-life of about 461 days, which is roughly 15 months. So, 15 Months best matches this known value. The shorter times (15 days or 1 month) are far too short for this nuclide, and the much longer period (150 months) is not accurate for Cadmium-109.

Half-life is the time required for a radioactive amount to decay to half of its initial quantity. Cadmium-109 has a half-life of about 461 days, which is roughly 15 months. So, 15 Months best matches this known value. The shorter times (15 days or 1 month) are far too short for this nuclide, and the much longer period (150 months) is not accurate for Cadmium-109.

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