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Select the correct statement...

Select the correct statement

A

Orthosilicate ion `(SiO_4^(4-))` and Perchlorate ion `(CIO_4^- )` are isoelectronic species

B

According to Rutherford formula, volume of a nucleus is directly proportional to mass number of nucleus

C

Isotopes have different number of nucleons in them

D

All atoms of Ar ,K and Ca are isobars of each other

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