Question

An isotope’s half-life is its particular rate of decay, or how much time it takes for ½ of the material to decay.
True False

Answer 1

its from equation of radioactive nucleus decay equation n=Ne^-lt and for when n=N0/2 putting this condition the time found is half life for that respective isotope

Answer 2

Definition is true, just as it sounds it should be.

Answer 3

Sounds false to me. An isotope's half-life is the time it takes for all the material to lose half of its radiologic activity

Answer 4

"half of the material" must refer to the isotope. Makes no sense for some mixture, which is not the subject of the question. TRUE.