Simple Ions: Atoms that have gained (cation) or lost (anion) electrons and the oxidation state is generally consistent.Family 1A (Alkali Metals): +1
Family 2A (Alkaline Earth Metals): +2
Family 3A (Boron Family): +3
Family 4A (Carbon Family): +4 or -4 (Depends on the element you're dealing with)
Family 5A (Nitrogen Family): -3
Family 6A (Chalcogens): -2
Family 7A (Halogens Family): -1
Family 8A (Nobel Gases): 0 (inert)
Multivalent Ions: Atoms of a given element may lose more or gain more electrons than another atom of the same element (Note: This applies to most of the B Families).
There is a very long list but the general rule is the roman numeral next to the Atomic Symbol represent how many are taken/added. For example Cu+1 is Cuprous in Latin and the Stock System* is Copper (1) while Cu+2 is Cupric in Latin and the Stock System* is Copper (2)
*Stock System is the elongated version of the Symbol and the Latin name.*
Polyatomic Ions (Also Known as Radicals): Sometimes groups of atoms will share electrons to form clusters that are not neutral like they should be (Note: Only the most common are listed below).
NH4+1: Ammonium
H3O+1: Hydronium
OH-1: Hydroxide
CN-1: Cyanide
C2H3O2-1: Acetate
CH3COO-1: Acetate (yes there are two)
ClO3-1: Chlorate
HCO3-1: Bicarbonate
CO3-1: Carbonate
NO2-1: Nitrate
NO2-1: Nirite
CrO4-2: Chromate
Cr2O7-2: Dichromate
HSO4-1: Bisulfate
SO3-2: Sulfite
SO4-2: Sulfate
PO3-3: Phosphite
PO4-3: Phosphate
In this ion the oxidation state of sulfur is 6+ and the oxidation state of each oxygen is 2-
K = +1 oxidation state Cl = +3 oxidation state O = -2 oxidation state
0 in elemental form and 2+ in its compounds.
O = -2 oxidation state H = +1 oxidation state
S = +4 oxidation state O = -2 oxidation state
In this ion the oxidation state of sulfur is 6+ and the oxidation state of each oxygen is 2-
In NaBrO3 the oxidation state of sodium (Na) is 1+, the oxidation state of bromine is 5+ and the oxidation state of each oxygen atom is 2-
The hydrogen atoms are each in the 1+ oxidation state. The oxygen is in it's 2- oxidation state.
Oxidation state is what determines the number of each atom. This is in the ionic formula.
This compound is not possible, but if it had been, the oxygen should have oxidation state of -4
In:(H2)g oxidation state: 0 In:(O2)g oxidation state: 0 In:(H2O)l oxidation state: H: +1 and O: -2
Titanium dioxide, TiO2, is a neutral compound. Each oxygen is in the O2- oxidation state, and titanium is in the Ti4+ oxidation state.
+4
+5. In oxyacids, oxygen has an oxidation state of -2 and hydrogen an oxidation state of +1. Therefore, the single chlorine atom must have an oxidation state of +5 for the total oxidation states to add to zero.+5. In oxyacids, oxygen has an oxidation state of -2 and hydrogen an oxidation state of +1
-2 oxidation state
+1 is the oxidation state of Hg in Hg2CI2.
the oxidation state of each atom