Physics · Atomic Structure and Periodic Properties

Consider the isoelectronic series: K+, S2-, Cl- and Ca2+. The ionic radii decrease in the order of:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1K+ > Ca2+ > S2- > Cl-
2Cl- > S2- > K+ > Ca2+
3Ca2+ > K+ > Cl- > S2-
4S2- > Cl- > K+ > Ca2+✓

Correct answer

S2- > Cl- > K+ > Ca2+

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Consider the isoelectronic series: K+, S2-, Cl- and Ca2+. The ionic radii decrease in the order of:

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Consider the isoelectronic series: K+, S2-, Cl- and Ca2+. The ionic radii decrease in the order of:

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