ORELA Chemistry (NT321) Practice Questions - Oregon Educator Licensure Assessments Chemistry (NT321) Exam

A sample emits alpha particles during radioactive decay. What change occurs in the nucleus of each decaying atom?

The atomic number increases by 1 and the mass number stays the same. The atomic number decreases by 2 and the mass number decreases by 4. The atomic number stays the same and the mass number decreases by 1. The atomic number decreases by 4 and the mass number decreases by 2.

Correct Answer:

The atomic number decreases by 2 and the mass number decreases by 4.

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