Question

_______ is measured in half-lives

Answer 1

Radioactive decay is measured in half-lives.

Answer 2

Answer: radioactive decay

Step-by-step explanation: Radioactivity is the phenomenon in which an unstable nuclei is converted to a stable nuclei by emitting radiations.

Radioactive decay always follows first order kinetics given by:

`t=(2.303)/(k)\log(a)/(a-x)`

where,

k = rate constant

t = time taken for decay process

a = initial amount of the reactant

a - x = amount left after decay process

Half life is the time required to decompose a radioactive material to half of its original value.

`t_(1)/(2)=(2.303)/(k)\log(a)/(a-(a)/(2))`

`t_(1)/(2)=(2.303)/(k)* log2}`

`t_(1)/(2)=(0.693)/(k)`