When a radioisotope under a nuclear decay , the
nucleus changes , when the an alpha decay occur the nucleus lost two proton and
two neutron, the atomic number and mass
of the subsequent atom will be less by 2
protons and 4 by mass.
When a
radioisotope under an electron capture, positron decay , a proton changes to neutron, the total
number of proton changes while the atom mass remain unchanged. The daughter
atom created will less in atomic by one.
While a beta minus decay will change a neutron into
proton , increase the number of proton by one while reducing the total number
of neutron by one. Though atomic mass does change. The daughter atom created is
will greater in atomic number by one.
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