If the mass defect of ${ }_{5}^{11}B$ is $0.081 \ u$,its average binding energy (in $MeV$) is

The reaction $_1H^2 + _1H^3 \to _2He^4 + _0n^1 + \text{energy}$ represents

Which of the following statements about radioactivity of an element is incorrect?

$_{92}U^{238}$ emits $8$ $\alpha$-particles and $6$ $\beta$-particles. The neutron/proton ratio in the product nucleus is

Nuclei tend to have more neutrons than protons at high mass numbers because

The atomic mass of an element is $12.00710 \, amu$. If there are $6$ neutrons in the nucleus of the atom of the element,the binding energy per nucleon of the nucleus will be $....... \, MeV$.
($e^{-} = 0.00055 \, amu$,$p = 1.00814 \, amu$,$n = 1.00893 \, amu$)