Question

Calculate the mass defect and binding energy in :

${}_5^{10}B$ (isotopic mass = 10.01019 amu)

• A. 67.3 MeV
• B. 99.9 MeV
• C. 89.9 MeV
• D. None of the above

Answer 1

The correct option is A 67.3 MeV

Binding energy is given as follows:

$E=\Delta E=\Delta m\times 931$ MeV (as $1$ amu $=931$ MeV)

Here,

$\Delta m=(5m_p+5m_n)–massof{B}^{10}$

$=(5\times 1.00759+5\times 1.008898)–10.01019$

$=0.07225$

$\Delta E=0.07225\times 931=67.26$ MeV