In case of isoelectronic species the size of F-, Ne and Na+ is affected by:
Classification of Elements & Periodicity · Class 11 · JEE Main Previous Year Question
In case of isoelectronic species the size of , Ne and is affected by:
- a
Principal quantum number (n)
- b
None of the factors because their size is the same
- c
Electron-electron interaction in the outer orbitals
- d✓
Nuclear charge (Z)
Nuclear charge (Z)
🧠 Isoelectronic species differ only in nuclear charge , , all have 10 electrons. The only thing that changes is : 9, 10, 11 respectively. More protons pull the same electrons closer → smaller size.
🗺️ Apply the rule (principal quantum number) is the same for all three — they are all in the same electron shell. Electron-electron interaction is also similar. Nuclear charge () is the only variable that changes size. Size order: .
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