Large energy released in an atomic bomb explosion is mainly due to

Uranium $_{92}U^{235}$ on bombardment with slow neutrons produces:

The huge amount of energy which is released during atomic fission is due to

Which among the following minerals contains a radioactive element?

Assertion : Nuclear binding energy per nucleon is in the order $_4^9Be > \,_3^7Li > \,_2^4He$.
Reason : Binding energy per nucleon increases linearly with the difference in the number of neutrons and protons.

If the amount of radioactive substance is increased three times and simultaneously the temperature is also increased three times,the number of atoms disintegrating per unit time would be