Question

At what point is the half-life of a radioactive isotope reached?

A. When half the parent nuclei in a sample have become daughter nuclei
B. When all the daughter nuclei in a sample have become parent nuclei
C. When half the daughter nuclei in a sample have become parent nuclei
D. When all the parent nuclei in a sample have become daughter nuclei​

Answer 1

A. When half the parent nuclei in a sample have become daughter nuclei

Step-by-step explanation:

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Answer 2

A. When half the parent nuclei in a sample have become daughter nuclei

Step-by-step explanation:

The point at which the half-life is reached is when half of the parent nuclei in a sample have become daughter nuclei.

Every radioactive atom starts with the parent. When they disintegrate they given the daughter nuclides.

The half - life is the time taken for half of the radioactive nuclei to disintegrate.

The shorter the half - life, the faster the decay process.

• When the number of parents becomes half and it leads to the formation of the daughter, the half life point is attained.