-3. To answer this kind of question, with rare exceptions, assume oxygen is -2 and hydrogen is +1. There are then 5 positive charges from these elements and only two negative charges, requiring nitrogen to have three additional negative charges to achieve electrical neutrality for the compound as a whole.
There are no nitrogen atoms in CaCO3!
5+
Gaining electrons lead to decrease in oxidation state.
Copper: 2+Oxygen: 2-Nitrogen: 5+
K = +1 oxidation state Cl = +3 oxidation state O = -2 oxidation state
There are no nitrogen atoms in CaCO3!
5+
The oxidation state of N in HNO3 is +5. Oxygen is -2 and H is +!.
Nitrogen is in the 3- oxidation state in calcium nitride.
+5 oxidation state
-3
nitroxide
The oxidation state of an individual sulfur atom in BaSo4 is +6.
The oxidation state of an individual sulfur atom in MgSO4 is +6.
Oxidation state of nitrogen.
In NH3 the oxidation state of Nitrogen is -3. It has 3 extra electrons in three polar covalent bonds, 'donated' from three bonded hydrogen atoms. Hydrogen has an oxidation state of +1 in this compound.
-3