A) \[N{{a}^{+}}\]
B) \[M{{g}^{2+}}\]
C) \[{{O}^{2-}}\]
D) \[C{{l}^{-}}\]
Correct Answer: D
Solution :
| Ion | \[N{{a}^{+}}\] | \[M{{g}^{2+}}\] | \[{{O}^{2-}}\] | \[C{{l}^{-}}\] |
| Atomic number | \[11\] | \[12\] | \[8\] | \[17\] |
| Number of electrons | \[10\] | \[10\] | \[10\] | \[18\] |
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