Asked by ama

determine the oxidation number of
MgBR2(s)
and
NH4No3(s)
Answered by DrBob222
You want the numbers for the molecule to add to zero. For example, Mg is in group II so it is +2. Br is -1(group VIIA or 17 depending upon the system you are using), there are two of them for a total if -2. +2 and -2 = 0
Here are a set of simple rules for helping determine the oxidation state of elements in compounds. Read those and do NH4NO3.
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