The hydride gap corresponds to elements of

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(A) The hydride gap refers to the region in the periodic table where elements do not form stable hydrides under normal conditions.These transition met

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group $7, 8, 9$

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(A) The hydride gap refers to the region in the periodic table where elements do not form stable hydrides under normal conditions.These transition metals exhibit a very low affinity for hydrogen in their standard oxidation states.Specifically,the metals belonging to group $7$,$8$,and $9$ of the periodic table do not form hydrides.Therefore,the group $7, 8, 9$ series is known as the hydride gap.

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