The size of the isoelectronic species Cl−, Ar and Ca2+ is affected by:
A
Principal quantum number of the valence shell
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B
Azimuthal quantum number of the valence shell
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C
Electron-electron interaction in the outer orbitals
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D
Nuclear charge
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Solution
The correct option is D Nuclear charge For isoelectronic species, more the nuclear charge lesser will be the size of the species. The valence electrons will experience a greater attractive force due to the increase in nuclear charge.