Question
1gm of 94Pu-239 is an α-emitter with a half life of 24400 yrs. given 1g sample of this plutonium how many α-particles will it emit per second?
(a) 2.27*10^9
(b) 2.27*10^10
(c) 2.27*10^11
(d) 2.27*10^12
Joshi sir comment
dn/dt = kn
so dn = (0.6932/24400*3.1*107)*(1/239)*6.023*1023*1
solve