When A $\beta ^ { - }$ Particle Is Emitted from an Unstable Nucleus, the Atomic Mass

question 128

Multiple Choice

When a $\beta ^ { - }$ particle is emitted from an unstable nucleus, the atomic mass number of the nucleus

• A) increases by 1 .
• B) decreases by 2 .
• C) decreases by 1 .
• D) increases by 2 .
• E) does not change.

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