Question

Half-life of ²⁰⁹Po is 102 y. How many alpha particles are emitted in 1 s from 2 mg sample of Po​

Answer 1

answer yessssssssssssssssssssssssssss

Answer 2

Given:

²⁰⁹Po half life  is 102 year

To Find:

No. of particles get emitted in 1 s from Po2 mg​ sample

Solution:

From Law of Radioactive Decay

We know Rate of disintegration$-\frac{dN}{dt}$

= λN

λ= decay constant

t = time

N = No. of atom

Half life = 0.693/λ

102 = 0.693/λ

λ= 0.0067

N = 2×  $10^{3}$ 6.023 ×$10^{23}$ / 209

   = 0.057 × $10^{20}$

put the value of λ and N in equation

No. of particle emitted = 3.8 × $10^{19}$