When hydrogen reacts with a metal to form a hydride (e.g.,CaH2) ,what are the oxidation numbers of the calcium (in this case) and hydrogen,respectively,in the product?
A) "-2 and +1"
B) "+1 and -2"
C) "+2 and -1
D) "0 and 0"
E) "+2 and -2"
Correct Answer:
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