Trinity G.
asked • 02/01/22Hydrogen can have an oxidation number of –1 when _______.
A. it is grouped in molecules with three or more atoms
B. it is grouped with just one other atom that is a noble gas
C. it is grouped with just one other atom that is a metal
D. it is grouped with just one other atom that is a non-metal
E. None of the Above
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1 Expert Answer
When it is bonded with a metal. H is usually +1 Ox St. when reacted with a non-metal, but it acts like a non-metal in the face of a metal which always has an Ox St > 0 when reacted.
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Stanton D.
So Trinity, you can solve this one by thinking hard about it. For H to take oxidation number of -1, that means something else would have to strongly take an oxidation number of probably +1, to balance formal charges in a neutral molecule. What element(s) strongly take an oxidation number of +1 ? -- Cheers, --Mr. d.02/01/22