To find the oxidation number for Ni (nickel), you look at the overall charge of the compound or ion it is a part of. For example, in NiCl2, each Cl has an oxidation number of -1, so the sum of the oxidation numbers must equal the overall charge of the compound. Therefore, as NiCl2 is neutral, the oxidation number of Ni must be +2.
nickel monocarbide tetraoxide
NiCl3 is an ionic compound. Nickel (Ni) is a transition metal with a variable oxidation state, which in this case is +2, and chlorine (Cl) is a halogen with a -1 oxidation state. The combination of these elements results in an ionic bond between Ni and Cl atoms.
Nickel(II) is the plus two (+2) oxidation state of nickel (Ni), and we write it Ni(II) or Ni++ when we set it down.
The oxidation number of nickel (Ni) in NiO2 is +4. Oxygen typically has an oxidation number of -2, so the total oxidation number of the compound is 0. Since there are two oxygen atoms in NiO2, the oxidation number of nickel must be +4 to balance out the charge.
This is a redox reaction. Since we have the following reaction: Ni + F2 --> Ni2+ + 2F- which is equivalent to (NiF2) The oxidation state of nickel increases by 2 - it is oxidized (Oxidation Is Loss: OIL) . The oxidation state of fluorine atoms decreases by 1, they are reduced (Reduction Is Gain: RIG).
The oxidation number of Ni in NiO is +2 because oxygen typically has an oxidation number of -2, and the overall compound is neutral.
The oxidation number for Ni in NiO2 is +4. Nickel is known to have variable oxidation states, and in this compound, it is bonded to two oxygen atoms which have an oxidation number of -2 each. The overall charge of the compound is neutral.
The oxidation state of chloride (Cl) is -1. As a halogen, chloride is usually found with an oxidation state of -1 in most compounds.
The oxidation state of calcium is +2.
The oxidation state of carbon in methanol (CH3OH) is +2. This is because oxygen has an oxidation state of -2 and hydrogen has an oxidation state of +1, so the carbon must have an oxidation state of +2 to balance the charges in the molecule.
2 oxidation state