A) \[N{{a}^{+}},C{{l}^{-}},C{{a}^{2+}}\]
B) \[C{{a}^{2+}},{{K}^{+}},{{S}^{2-}}\]
C) \[N{{a}^{+}},A{{l}^{3+}},B{{e}^{2+}}\]
D) \[C{{l}^{-}},{{F}^{-}},{{S}^{2-}}\]
Correct Answer: B
Solution :
:Species | At No. | No. of \[{{e}^{-}}\] |
\[C{{a}^{2+}}\] | 20 | 18 |
\[{{K}^{+}}\] | 19 | 18 |
\[{{S}^{2-}}\] | 16 | 18 |
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