NEET | 2013Nuclear Physics and RadioactivityHard
Question
The half life of a radioactive isotope ′X′ is 20 years. It decays to another element ′Y′ which is stable. The two elements ′X′ and ′Y′ were found to be in the ratio 1 : 7 in a sample of a given rock. The age of the rock is estimated to be:
Options
A.100 years
B.40 years
C.60 years
D.80 years
Solution
X → Y (stable)
NX Ny
By using
, we have 
years = 60 years.Create a free account to view solution
View Solution FreeMore Nuclear Physics and Radioactivity Questions
adius of nucleus varies as R = R0(A)1/3, where R0 = 1.3 fermi. What is the volume of Be8 nucleus (approx) [A = atomic ma...A photon of energy 12.09 eV is completely absorbed by a hydrogen atom initially in the ground state. The quantum number ...Probability of remains active of a nucleus in one mean life is :-...A nuclear fission is given below A240 → B100 + C140 + Q(energy) Let binding energy per nucleon of nucleus A, B and...The potential difference applied to an X - ray tube is increase. As a result, in the emitted radiation...