What are the oxidation numbers of the atoms in this reaction? check all that apply. mg(s) + 2hcl(aq) ? mgcl2(aq) + h2(g) 0 for mg in mg and mgcl2 0 for mg(s) and h in h2 +1 for h in hcl -1 for cl in hcl +2 for mg in mgcl2