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valency of hydrogen is one
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Hydrogen is a unique atom, because it has only two spots in its outermost electron level. ... Hydrogen's valence number is one, because it has only one valence electron and needs only one shared electron to fill its energy levels. This means it can bond with many.
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Hydrogen's valence number is one, because it has only one valence electron and needs only one shared electron to fill its energy levels. This means it can bond with many elements.
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