Which of the following is a wrong representation of atom and it's ion?

R b / R b^{-}

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M g / M g^{2 +}

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F / F^{-}

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L i / L i^{+}

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B r / B r^{-}

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Solution

The correct option is A $R b / R b^{-}$
$R b$ is a alkali metal that has tendency to release one electron and form mono-positive ion. It can not hold negative charge. So, the correct representation of atom and its ion is $R b / R b^{+}$ .

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