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When hydrogen is combined with a metal, it has an oxidation number of _____. A. 0 B. +1 C. -1 D. -2
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When hydrogen is combined with a metal, it has an oxidation number of _____.

A. 0
B. +1
C. -1
D. -2

User FirstDivision
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The answer is c because thats the number when combined with a metal. +1 is when its combined with a nonmetal. 
User Durkee
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