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Hydrogen does not show metallic character because of

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very high ionization energy

higher electronegativity than metals in general

only one electron in its atom

diatomic nature of its molecule

answer is A.

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Detailed Solution

Metals have low ionization energy. ionization energy of H-atom is 1312 kJ ${mol}^{- 1}$ while that of Li, it is 520 kJ ${mol}^{- 1}$ only.

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