It is equal to the charge. So Oxidation number is +1
The oxidation number of mercury in the mercurous ion (Hg₂²⁺) is +1. Each mercury atom in the mercurous ion carries a charge of +1.
+1 for Hg in the Hg22+ ion
In MgBr2, the magnesium ion (Mg) has an oxidation number of +2, while the bromide ion (Br) has an oxidation number of -1.
The oxidation number of carbonate ion (CO3) is -2. Each oxygen atom has an oxidation number of -2, and the sum of the oxidation numbers in the ion must equal the charge of the ion, which is -2.
The oxidation number of the nitrite ion (NO2-) is -1. The oxidation number of nitrogen in the nitrite ion is +3, and each oxygen atom has an oxidation number of -2.
The oxidation number of mercury in the mercurous ion (Hg₂²⁺) is +1. Each mercury atom in the mercurous ion carries a charge of +1.
+1 for Hg in the Hg22+ ion
In MgBr2, the magnesium ion (Mg) has an oxidation number of +2, while the bromide ion (Br) has an oxidation number of -1.
The oxidation number of carbonate ion (CO3) is -2. Each oxygen atom has an oxidation number of -2, and the sum of the oxidation numbers in the ion must equal the charge of the ion, which is -2.
The oxidation number of the nitrite ion (NO2-) is -1. The oxidation number of nitrogen in the nitrite ion is +3, and each oxygen atom has an oxidation number of -2.
The oxidation number of a monatomic ion equals its charge. For example, the oxidation number of a sodium ion (Na+) is +1, which matches its charge of +1.
The oxidation number of nitrogen in the ammonium ion NH4+ is -3, and the oxidation number of hydrogen is +1. In ammonium chloride NH4Cl, the net charge on NH4 is +1 because the chloride ion Cl- has an oxidation number of -1.
To find the oxidation number or charge of a polyatomic ion, consider the known charges of the individual atoms within the ion. For example, in the sulfate ion (SO4)2-, oxygen typically has an oxidation number of -2, and sulfur would then have an oxidation number to balance the charge of the ion. The sum of the oxidation numbers of all the atoms in the ion should equal the overall charge of the ion.
Hydronium ion is H3O+ ion and has no carbon in it.
A monatomic ion is an ion consisting of a single atom with a positive or negative charge. The oxidation number of a monatomic ion is equal to the charge of the ion.
The positive oxidation number indicates the number of electrons an ion has lost, while the negative oxidation number indicates the number of electrons gained. The oxidation number provides information on the charge of the ion and its ability to form chemical bonds.
The oxidation number of any monoatomic ion is equal to the charge of the ion. For example, the oxidation number of the sodium ion (Na+) is +1, and the oxidation number of the chloride ion (Cl-) is -1.