What is the Isoelectronic Series?

Introduction

All members of an isoelectronic series have the same number of electrons.

Example:

O2−, F−, Na+, Mg2+, Al3+ (Having all 10 electrons)
As the nuclear charge increases in an isoelectronic series, ions become smaller:
O2− > F− > Na+ > Mg2+ > Al3+

Exercise-2 on Comparing Sizes of Atoms and Ions of an Isoelectronic Series

Exercise-2: Cations and Anions of an Isoelectronic Series

Check your answers here:

 Solutions



Exercise-3 on Comparing Sizes of Atoms and Ions of an Isoelectronic Series

Exercise-3: Cations and Anions of an Isoelectronic Series

Check your answers here:

 Solutions



summary-trends-ionic-sizes


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