Question
Question: K<sup>+</sup>, Cl<sup>–</sup>, Ca<sup>2+</sup> and S<sup>2–</sup> are isoelectronic. The decreasing ...
K+, Cl–, Ca2+ and S2– are isoelectronic. The decreasing order of their size is –
A
S2–>Cl–> K+> Ca2+
B
Ca2+> K+>Cl–> S2–
C
Cl–> S2–> Ca2+> K+
D
K+>Cl–> Ca2+> S2–
Answer
S2–>Cl–> K+> Ca2+
Explanation
Solution
Size of isoelectronic decreases with increase in atomic number.