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N in NO3(-)
+5
Cr in CrO4(2-)
+6
Cr in Cr2O7(2-)
+6
Mn in MnO4(-)
+7
Li
+1
Na
+1
K
+1
Mg
+2
Ca
+2
Ba
+2
Al
+3
F
-1
Cl
-1
Br
-1
I
-1
O
-2
H
+1