if the electron configuration of hydrogen is 1 so why it has a valency of +1why not -1 as the rule of electronic configuration say that an element must have 2electrons in its innermost shell
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Explanation:
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hydrogen shows metallic properties and metals are cations . they lose electrons to form ions .
according to the duplet rule, the last shell must have 2 electrons and hydrogen already has one shell.
thus, it shares its electrons to form compounds.