Which one the following sets of ions represents the collection of isoelectronic species?

Question

Which one the following sets of ions represents the collection of isoelectronic species? (A) K+, Ca2+, Sc3+, Cl- (B) Na+, Mg2+, Al3+, Cl- (C) K+, Cl-, Mg2+, Sc3+ (D) Na+, Ca2+, Sc3+, F-

Tardigrade Admin · Accepted Answer

Isoelectronic means the species must have the same electronic configuration.

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Only the set of

K^{+}, C a^{2 +}, S c^{3 +}, C l^{-}

represents isoelectronic species.

K, Z = 19

, Number of electrons in

K^{+} = 18

C a, Z = 20

, Number of electrons in

C a^{2 +} = 18

S c, Z = 21

, Number of electrons in

S c^{3 +} = 18

Cl, Z = 17

, Number of electrons in

C l^{-} = 18

Q. Which one the following sets of ions represents the collection of isoelectronic species?

$K^{+}, C a^{2 +}, S c^{3 +}, C l^{-}$

$N a^{+}, M g^{2 +}, A l^{3 +}, C l^{-}$

$K^{+}, C l^{-}, M g^{2 +}, S c^{3 +}$

$N a^{+}, C a^{2 +}, S c^{3 +}, F^{-}$

Q. Which one the following sets of ions represents the collection of isoelectronic species?

K+,Ca2+,Sc3+,Cl−

Na+,Mg2+,Al3+,Cl−

K+,Cl−,Mg2+,Sc3+

Na+,Ca2+,Sc3+,F−

$K^{+}, C a^{2 +}, S c^{3 +}, C l^{-}$

$N a^{+}, M g^{2 +}, A l^{3 +}, C l^{-}$

$K^{+}, C l^{-}, M g^{2 +}, S c^{3 +}$

$N a^{+}, C a^{2 +}, S c^{3 +}, F^{-}$