Question

What is a half-life?
Question 2 options:


Half the time it takes for an organism to become extinct


The spontaneous breakdown of atomic nuclei


The time it takes for half a radioactive sample to decay


Atoms of the same element with a different number of neutrons

Answer 1

I'd go with option "C"

Answer 2

it is the time taken for the radioactivity of a specified isotope to fall to half its original value.

was it worth it? XD