-2. oxygen as oxide is always -2 (it is notionally present as O2- )
-2
The usual oxidation state for oxygen in a compound is -2.
In the compound Al₂O₃, aluminum has an oxidation number of +3, and oxygen has an oxidation number of -2. This gives a total charge of zero for the compound, as it should be electrically neutral.
Usually the oxidation no of oxygen is -2 and the oxidation no of hydrogen is +1 in a compound.
The oxidation number of Mn in KMnO4 is +7. This is because oxygen (O) is typically assigned a -2 oxidation state, with the total oxidation state of the compound being 0. By following the rule that the sum of oxidation states in a compound is equal to the charge of the compound, we find that Mn is in the +7 oxidation state in KMnO4.
-2
The usual oxidation state for oxygen in a compound is -2.
In the compound Co2O3 cobalt has an oxidation number of 3 while oxygen has an oxidation number is -2.
Usually, oxygen has an oxidation of -2 (that is unless in a compound with peroxides or halogens).
In the compound Al₂O₃, aluminum has an oxidation number of +3, and oxygen has an oxidation number of -2. This gives a total charge of zero for the compound, as it should be electrically neutral.
Usually the oxidation no of oxygen is -2 and the oxidation no of hydrogen is +1 in a compound.
Are you thinking of a phosphorus oxide (PO) or elemental metal polonium 'Po'. ???? If you are thinking of an oxide of phosphorus , then the chemical formula is P2O5, or its dimer P4O10; (PO) does NOT exist . If you are thinking of the elemental metal polonium , then the chemical symbol is 'Po'. Note the small case 'o'. Polonium is a highly radio-active and poisonous metal, and is kept in a very secure environment.
The oxidation number of Mn in KMnO4 is +7. This is because oxygen (O) is typically assigned a -2 oxidation state, with the total oxidation state of the compound being 0. By following the rule that the sum of oxidation states in a compound is equal to the charge of the compound, we find that Mn is in the +7 oxidation state in KMnO4.
The oxidation number of Fe in Fe2O3 is +3 because oxygen typically has an oxidation number of -2 and there are 3 oxygen atoms for every 2 iron atoms in the compound, making the overall charge -6 for oxygen. To balance the charges, each iron atom must have a charge of +3.
In Ni2O3, since oxygen has an oxidation number of -2 and there are three oxygen atoms, the total oxidation number contributed by oxygen is -6. Since the compound as a whole is neutral, the total oxidation number must be 0. Therefore, the oxidation number of nickel (Ni) in Ni2O3 is +3 to balance out the oxidation number from oxygen.
In the compound Fe2O3, iron has an oxidation number of +3 because oxygen typically has an oxidation number of -2. Iron needs two atoms of oxygen to balance its +6 oxidation state, hence the compound with the formula Fe2O3.
Cobalt has an oxidation number of 3 (III) in the compound Co2O3.