An ion has 18 electrons in the outermost shell, it is [CBSE PMT 1990]

1.	An ion has 18 electrons in the outermost shell, it is [CBSE PMT 1990]
A.	\[C{{u}^{+}}\]
B.	\[T{{h}^{4+}}\]
C.	\[C{{s}^{+}}\]
D.	\[{{K}^{+}}\]
Answer» B. \[T{{h}^{4+}}\]

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An ion has 18 electrons in the outermost shell, it is [CBSE PMT 1990]

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