Answered: A radioactive sample of 60Co (t₁/2 =…

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A radioactive sample of 60Co (t₁/2 = 5.271 y) has a ß- activity of 4.4 X 107 Bq. How many grams of 60Co are present?

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Question

A radioactive sample of 60Co (t₁/2 = 5.271 y) has a ß-
activity of 4.4 X 107 Bq. How many grams of 60Co are
present?

Expert Solution

Concept and Principle:

When the number of protons and neutrons inside a nucleus is not balanced some nuclei will become unstable. When a nucleus is unstable they try to become stable by removing nucleons through radiation. This process is called radioactive decay.

The rate of this decay is defined as the activity of a radioactive sample. It is given by,

$a = N λ$

Here N is the number of nuclei undergoing decay and λ is the decay constant.

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