The plot of binding energy per nucleon against the mass number for stable nuclei is shown in the figure. Which curve is correct?

If mass-energy equivalence is taken into account,when water is cooled to form ice,the mass of water should

State Einstein's special theory of relativity and provide the mass-energy equivalence formula.

Consider the following nuclear reaction : $^{238}\text{U} \rightarrow ^{234}\text{Th} + ^4\text{He}$. Take masses of $^{238}\text{U}$, $^{234}\text{Th}$ and $^4\text{He}$ as $238.050 \text{ u}$, $234.043 \text{ u}$ and $4.003 \text{ u}$, respectively. The $Q$ value for the reaction, in $\text{keV}$, is : [Given : $1 \text{ u} = 931.5 \text{ MeV/c}^2$]

For the decay of a nucleus,which of the following is $NOT$ a possible reason?

The nucleus having the highest binding energy per nucleon is