Assuming the experimental mass of 612C as 12 u, the mass defect of 612C atom is _______ MeV/c2.
(Mass of proton =1.00727 u, mass of neutron =1.00866 u, 1 u=931.5 MeV/c2 and c is the speed of the light in vacuum).
Held on 5 Apr 2026 · Verified 6 Jul 2026.
127.5
89.03
272.0
92.0
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