When a substance decays by beta emission,the mass number of the nucleus ________ and the atomic number ________.

Name: When a substance decays by beta emission,the mass number of the nucleus ________ and the atomic number ________.
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During beta decay, a neutron in the nucleus is transformed into a proton and an electron (beta particle). The mass number remains the same because the total number of protons and neutrons is unchanged, but the atomic number increases by 1 due to the addition of a proton.

When a Substance Decays by Beta Emission,the Mass Number of the Nucleus