Question

If a star can convert all the He nuclei completely into oxygen nuclei, the energy released per oxygen nuclei is:

[Mass of $He$ nucleus is $4.0026amu$ and mass of oxygen nucleus is $15.9994amu$]

• A. $7.6MeV$
• B. $56.12MeV$
• C. $10.24MeV$
• D. $23.9MeV$

Answer 1

The correct option is C $10.24MeV$

$4\left({{}_{2}He}^4\right)⟹{{}_{8}O}^{16}$

Mass defect, $\Delta m=4\times 4.0026-15.9994=0.011amu$
Energy released per oxygen nuclei will be:
$E=0.011\times 931.48MeV=10.24MeV$