4. They are +1, +2, +3, +4. The +1 and +2 oxidation numbers are the best known.
It depends on the compound. +1 and +2 are the more common ones (as in Cu2I2 and CuI2 respectively). In elemental form, its oxidation number is zero.
In copper sulfate (CuSO4), the oxidation number of sulfur is +6. This is because the oxidation number of copper (Cu) is +2 and oxygen (O) typically has an oxidation number of -2, so the algebraic sum in the compound should be zero.
If the question is Cu2, then it is equivalent to Cu and the oxidation number for any element is zero. If the question is Cu2+, then the oxidation number is +2.
Copper iodide has a chemical formula of CuI. In this compound, the oxidation number of copper is +1.
The oxidation number of copper (Cu) in CuCO3 is +2. Oxygen typically has an oxidation number of -2, and the overall charge of the carbonate ion (CO3) is -2. Therefore, the oxidation number of copper is determined to be +2 in this compound.
The oxidation number for copper metal is 0. This is because copper atoms in their elemental form have a neutral charge, with an equal number of protons and electrons.
The oxidation number of copper (II) is +2. This means that copper has lost two electrons in a chemical reaction and has a charge of +2.
The oxidation number of copper in CuI is +1. This is because iodine has an oxidation number of -1, and in ionic compounds like CuI, the overall charge must be neutral. Since there is only one iodine atom with a charge of -1, the copper atom must have an oxidation number of +1 to balance the charges.
The oxidation number of copper in CuNH3Cl2NO3 is +1. This is because the overall charge of the complex ion is -1, and the oxidation numbers of N, H, Cl, and O remain the same as their typical values, leaving copper with a +1 oxidation state to balance the charge.
+2 oxidation state for the Copper. -1 for the Chloride
It has 3 main oxidation numbers.They are zero +1 and +2.
3+