Chemistry, 27.05.2021 21:00 corrineikerd

Which emission causes the atomic number of a nuclide to decrease by 2 and its mass number to decrease by 4?
1.
an alpha particle
2.
a beta particle
3.
gamma radiation
4.
a positron

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Which emission causes the atomic number of a nuclide to decrease by 2 and its mass number to decrea...