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An alpha particle (.^(4)He) has a mass o...

An alpha particle `(.^(4)He)` has a mass of 4.00300 amu. A proton has a mass of 1.00783 amu and a neutron has a mass of 1.00867 amu respectively. The binding energy of alpha particle estimated from these data is the closest to

A

27.9 MeV

B

22.3 MeV

C

35.0 MeV

D

20.4 MeV

Text Solution

Verified by Experts

The correct Answer is:
A
`Delta m`= mass defect `=2 (m_(p) + m_(n)) - m_(He)= 0.0300` amu
`Delta E_(b)= Delta mc^(2)= 0.03 xx 931.5 MeV= 27.9 MeV`
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