oxidation number
oxidation state

It is composed of lead in its +4 oxidation state.

Their most common oxidation states are 2, +2, +4, and +6.

Less common oxidation states of gold include 1, +2, and +5.

The data can be extended to include products in lower oxidation states.

The most common oxidation states are +2, +3, +4, and +8.

The nitrogen is in the -3 and +5 oxidation states.

For each oxidation state use the parameters from the table shown below.

Chemistry in the 0 oxidation state is far more limited.

Despite such figures, the +2 oxidation state is rare, with +4 and +6 being more common.

Many elements can exist in more than one oxidation state.