An atom of carbon-12 and an atom of carbon-14 differ in(1) atomic number(2) mass number(3) nuclear charge(4) number of electrons

The correct answer is option (2).

Explanation:

Carbon-12:

Atomic Number = 6

Mass number = 12

Nuclear charge =  number of protons = +6

Number of electrons = 6

Carbon-14:

Atomic Number = 6

Mass number = 14

Nuclear charge =  number of protons = +6

Number of electrons = 6

An atom of carbon-12 and an atom of carbon-14 only differ in their mass number as C-12 has mass number of 12 and C-14 has mass number of 14.

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