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.
Nickel is in the d block. Ni shows +3 as the highest.
nickel monocarbide tetraoxide
in NiO2 the oxidation number for Ni is 4+ and the oxidation number for oxygen is 2-.
-2 oxidation state
K = +1 oxidation state Cl = +3 oxidation state O = -2 oxidation state
Fe = +3 oxidation state Cl = -1 oxidation state
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).
O = -2 oxidation state H = +1 oxidation state
Mg = +2 oxidation state P = +5 oxidation state O = -2 oxidation state
It depends on what form it is in. It can be in the 4+ oxidation state, 4- oxidation state and every oxidation state in between.
Nickel has four oxidation states: Ni(I), Ni(II), Ni(III), and Ni(IV). Selenium is a group 6 non-metal...so it's oxidation state is -2. Therefore, you can have four possible formulas for nickel selenide: Ni2Se, NiSe, Ni2Se3, and NiSe2. However, the three most commonly found are: NiSe, Ni2Se3, and NiSe2.