# Question #f18b2

##### 1 Answer

Dec 21, 2016

An exponential decay which describes nuclear disintegration can be described in terms of half-life as below

#N(t)=N_{0}({1}/{2})^{\frac {t}{t_{1//2}}}# .....(1)

where#N_0# is the initial quantity of the disintegrating sample,

#N(t)# is the quantity of sample that still remains after a time#t# ,

#t_(1//2)# is the half-life of the sample.

- the quantity
#N_0# may be measured in grams, moles, number of atoms etc. - It is statistical probability that half of the sample would decay in a time equal to one Half life.

Inserting given values in the equation (1) we get

From definition of half life, probability of nuclear disintegration in