Which of the following is the correct order o | vedclass

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(A) The size of an anion is always larger than its parent atom due to an increase in electron-electron repulsion and a decrease in effective nuclear c

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$H^{-} > H > H^{+}$

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(A) The size of an anion is always larger than its parent atom due to an increase in electron-electron repulsion and a decrease in effective nuclear charge $(Z_{eff})$. Conversely,the size of a cation is always smaller than its parent atom due to the loss of an electron shell and an increase in effective nuclear charge $(Z_{eff})$. For the hydrogen species: $H^{-}$ has two electrons,$H$ has one electron,and $H^{+}$ has no electrons. Therefore,the correct order of radius is $H^{-} > H > H^{+}$.

Which of the following is the correct order of ionic/atomic radius?

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In the periodic table,going down in the fluorine group $(Group \ 17)$:

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