Class 11 Chemistry simulations · Classification of Elements and Periodicity in Properties

Sizes of isoelectronic ions

Compare ions that all have 10 electrons (the neon configuration) but different nuclear charges.

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What to notice

N³⁻ is the largest and Al³⁺ the smallest, though all have 10 electrons.

Key relation

Same electrons, larger nuclear charge → stronger pull → smaller ion

Try this

Which ion has the highest effective nuclear charge per electron?

What you can change

• Ion: 1 to 6

More in Classification of Elements and Periodicity in Properties

• Periodic trends

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