how is the atomic number of
a nucleus changed by gamma decay
The atomic number of nuclide that undergoes gamma
radioactive decay does not change. Gamma ray does not contain particle or mass,
therefore its emission does not contribute to any lost of particle by the atom.
( unlike alpha that lead to loss of four nucleons and beta that lead to lost or
gain of proton or neutron). Gamma rays
are only electromagnetic radiations, we can say that their emission will result
to loss of energy by the atom; atomic number as well as the atomic mass remain
unchanged.
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