which definition describes a half - life? the time required for half of a radioactive sample to decay. the…

which definition describes a half - life? the time required for half of a radioactive sample to decay. the time required for half of a radioactive sample to become unstable. the time required for all of a radioactive sample to change because of heat. the time required for all of a sample to break down due to pressure change.

which definition describes a half - life? the time required for half of a radioactive sample to decay. the time required for half of a radioactive sample to become unstable. the time required for all of a radioactive sample to change because of heat. the time required for all of a sample to break down due to pressure change.

Answer

Brief Explanations:

Half - life is a well - known concept in nuclear physics. It specifically refers to the time it takes for half of a radioactive sample to decay into other substances through radioactive decay processes. Radioactive samples are initially unstable and half - life is not about becoming unstable. Also, it has nothing to do with changes due to heat or pressure change.

Answer:

The time required for half of a radioactive sample to decay.