1. Tardigrade
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  3. Physics
  4. The mass of proton is 1.0073 u and that of neutron is 1.0087 u ( u = atomic mass unit). The binding energy of 24 He is

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Q. The mass of proton is $1.0073\, u$ and that of neutron is $1.0087\, u ( u =$ atomic mass unit). The binding energy of ${ }_{2}^{4} He$ is

BHUBHU 2007Atoms

Solution:

Mass defect $=2 M_{ P }+2 M_{ N }-M_{ He }$
$=2 \times 1.0073+2 \times 1.0087-4.0015=0.0305$
$\Rightarrow$ Binding energy $=(931 \times$ mass defect $) MeV$
$=931 \times 0.0305 \,MeV =28.4 \,MeV$