Question
Question: The decreasing order of size of isoelectronic series K<sup>+</sup>, Ca<sup>2+</sup>, Cl<sup>–</sup> ...
The decreasing order of size of isoelectronic series K+, Ca2+, Cl– and S2– is :
A
K+>Cl–> S2–> Ca2+
B
Ca2+ > K+>Cl–> S2–
C
Ca2+> S2–> K+>Cl–
D
S2–>Cl–> K+> Ca2+
Answer
S2–>Cl–> K+> Ca2+
Explanation
Solution
S–2 > Cl– > K+ > Ca+2