+1 for Na and -1 for Cl.
The oxidation number of Na in NaCl is +1, while the oxidation number of Cl in NaCl is -1.
For Mg the oxidation no is +2 while it is -2 for oxygen.
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+2 for Mn and -1 for each Cl.
-2 for each O +6 for S
-2 for each Oxygen +4 for each Carbon
Na: +1 Cl: -1
The hydrogen atoms are each in the 1+ oxidation state. The oxygen is in it's 2- oxidation state.
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For Mg the oxidation no is +2 while it is -2 for oxygen.
+2 for Mn and -1 for each Cl.
-2 for each O +6 for S
-2 for oxygen and +1 for each nitrogen
-2 for each Oxygen +4 for each Carbon
There are 3 elements. This is meta phosphoric acid.
The oxidation numbers for the atoms in magnesium oxide are: Mg+2 and O-2.
The oxidation number is located in the top right-hand corner of each element box; for many elements there is more than one.
The oxidation number of any element by itself is 0.