- #1

Hysteria X

- 21

- 0

## Homework Statement

In a chain radioactive disintegration,the half-life of the parent and daughter nuclide are 10 years and 25 years respectively.if the disintegration process is at its equilibrium stage with the parent no. of nuclei equal to 5* 10^8, the daughter no. of nuclei will be

## Homework Equations

t1/2 = 0.639/λ

n/n

_{0}=(1/2)^(t/(t1/2))

n/n

_{0}=##e^-λt##

## The Attempt at a Solution

t

^{1}1/2 = 10 years

t

^{2}1/2 = 25 years

N=N

_{o}(because its at equilibrium)

→e^-tλ=1

tλ=0??