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Which consequence results when an unstable nuclide undergoes beta decay?

A)Atomic number increases by one
B)Neutron number remains constant
C)Mass number significantly decreases
D)New element's charge becomes negative

💡 Explanation

Beta decay converts a neutron into a proton via Weak Interaction, increasing the atomic number because the emitted electron carries away negative charge. It increases rather than decreasing atomic number, because positive charge must be conserved, therefore total charge equals zero after decay.

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