1.

A positron is emitted from ._(11)Na^(23) . The ratio of the atomic mass and atomic number of the resulting nuclide is

Answer»

22/10
22/11
23/10
23/12

Solution :`._(11)^(23) Na rarr ._(10)Ne^(23) +. _(+1) E^(0)`
RATE of ATOMIC mass and atomic number `=(23)/(10)`


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