Isotopes are those atoms which have same :

atomic number

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atomic mass

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atomic charge

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all

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Solution

The correct option is C atomic number
Isotopes are the atoms of a given element which have the same atomic number (Z) but different mass number (A), i.e. they have same nuclear charge (Z) but different number of neutrons (AZ).

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Which one of the following statements does apply to atoms which are isotopes of the same element?

Isotopes are atoms having

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