1.

The mass defect of the nuclear reaction ._(5)B^(8) rarr ._(4)Be^(8) + ._(1)e^(0) is Delta m, the wrong expression "is"//"are"

Answer»

`Delta m =` atomic mass of `(._(4)Be^(8) - ._(5)B^(8))`
`Delta m =` atomic mass of `(._(4)Be^(8) - ._(5)B^(8)) +` mass of one ELECTRON
`Delta m =` atomic mass of `(._(4)Be^(8) - ._(5)B^(8)) +` mass of one positron
`Delta m =` atomic mass of `(._(4)Be^(8) - ._(5)B^(8)) +` mass of TWO electrons

Answer :A::B::C


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