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During nuclear decay, if the atomic number decreases by one but the mass number is unchanged, the radiation emitted is

A positron
An alpha particle
A beta particle
None of these choices are correct

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quasarJose

Answer:

A beta particle

Explanation:

The radioactive particle must undergo a beta decay to have the mass number unchanged but the atomic number to have decreased by one.

This type of beta decay results in the emission of a positron which is a type of beta particle. It resembles an electron but it has a positive charge of 1.

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