Classification Of Elements And Periodicity In Properties Question 130
Question: Which one of the following sets of ions represents the collection of isoelectronic species
Options:
A) $ {{K}^{+}},C{{l}^{-}},M{{g}^{2+}},S{{c}^{3+}} $
B) $ N{{a}^{+}},C{{a}^{2+}},S{{c}^{3+}},{{F}^{-}} $
C) $ {{K}^{+}},C{{a}^{2+}},S{{c}^{3+}},C{{l}^{-}} $
D) $ N{{a}^{+}},M{{g}^{2+}},A{{l}^{3+}},Cl $
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Answer:
Correct Answer: C
Solution:
[c] Isoelectronic species are those which have same no. of electrons. $ {{K}^{+}}=19-1=18 $ ; $ C{{a}^{+2}}=20-2=18 $ $ S{{c}^{+3}}=21-3=18 $ ; $ C{{l}^{-}}=17+1=18 $
BETA
