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

question 30

Multiple Choice

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

• A)decreases by 2,remains the same
• B)increases by 2,remains the same
• C)remains the same,decreases by 1
• D)remains the same,increases by 1

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