The graph below shows the radioactive decay of a material whose half life is 25 years.

Graph with amount of radioactive material present (in grams) plotted on y axis and number of half-lives plotted on x axis. The points (0, 100), (1, 50), (2, 25), (3, 12.5), and (4, 6.25) have been joined using a smooth curve.

In your own words, summarize the information provided by the graph about the radioactive decay of the material.

The half life is the time taken for the amount of a substance to become half of its original value. If we take the initial value to be 30 on the y-axis, the half of 30 is 15. We check the time at which the substance has reduced to 15 atoms and this is about 40 seconds. 40 seconds therefore, is your answer.

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shivjimishraVT shivjimishraVT · Answer 2 · 2022-05-16T16:00:37+02:00

A half-life may be defined as the time required for the amount of substance reduces to exactly half of its original value.

What do you mean by Radioactive decay?

Radioactive decay may be defined as the process by which an unstable atomic nucleus loses energy by radiation.

The graph represented above indicates the exact half-life of any compound with respect to time. A smooth curve is plotted in order to mention the half-life.

If you take 100 grams of any compound, its half-life is 40 minutes. By this, it can easily be determined that after 40 minutes, the original compound left only to 50 grams. After 40 minutes again, the compound is left to 25 grams, and the process goes on similarly.

Therefore, it is well described above.

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