1.
Average binding energy is maximum for
2.
A nucleus undergoes y-decay due to
3.
The decay constant of a radioactive substance is X. Its half-life and mean life, respectively are
4.
Sun's radiant energy is due to
5.
y-rays are originated from
6.
Binding energy per nucleon of a stable nucleus is
7.
P-rays emitted by a radioactive material are
8.
During a mean life of a radioactive element the fraction that disintegrates is
9.
When a radioactive nucleus emits a (β-particle, the mass number of the atom:
10.
In a β-decay