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QJEEM19Chcdcd: JEE Main 2019 Chemistry - Class 11 JEEM19Chcdcd Solution: The size of the iso-electronic species Cl – , Ar and Ca…
The size of the iso-electronic species Cl–, Ar and Ca2+ is affected by :
Multiple Choice Options
- A electron-electron interaction in the outer orbitals
- B Principal quantum number of valence shell
- C nuclear charge
- D azimuthal quantum number of valence shell
Step-by-Step Verified Solution
| Cl- | Ar | Ca+2 | |
|---|---|---|---|
| Protons | 17 | 18 | 20 |
| Electrons | 18 | 18 | 18 |
Nuclear charge means number of protons present in the nucleus. Here maximum number of protons present in the Ca+2 ion, so the attraction towards those 18 electrons wll be most by the nucleus of the Ca+2 ion. That is why size of the Ca+2 ion wll be least because of highest nuclear charge.