Angola 12th Grade Chemistry National Exam Practice Questions - Angola 12th Grade National Examination - Chemistry (Exame Nacional De Química 12.a Classe - INADE MED) Exam

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Which of the following correctly arranges the isoelectronic species S2-, Cl-, K+, and Ca2+ in order of decreasing ionic radius (largest to smallest)?

S2- > Cl- > K+ > Ca2+ Ca2+ > K+ > Cl- > S2- K+ > Ca2+ > S2- > Cl- Cl- > S2- > Ca2+ > K+

Correct Answer:

S2- > Cl- > K+ > Ca2+

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