As an element, magnesium has an oxidation number of zero - it has control of it's own electrons, no more, no less.
When it reacts, it gives away two electrons and becomes a 2+ ion. It therefore has an oxidation number of +2.
All elements have an oxidation number of 0.
In compounds;
Everything in group 1 will take an oxidation number of +1.
Everything in group 2 will take an oxidation number of +2.
Halides generally have oxidation numbers of -1 but chlorine has many possibilities.
Hydrogen is generally +1 but can be -1 if combined with a metal.
Oxygen is always -2.
You work out the oxidation numbers of other things using these, for example, in the ion NO3- each oxygen is -2, there are three of them, making -6.
The overall ion is -1, so the N must be +5.This doesn't mean it is an ion that has lost 5 electrons, it means that it has given away control of 5 electrons to the oxygens that it is covalently bonded with.
The oxidation number of oxygen can go from -2 to +2.
The highest is therefore +2 and the lowest is -2
the answer is -2.Related Information:The oxidation number of oxygen when it appears as an element is 0. The oxidation number in all compounds but peroxides is -2. The oxidation number of oxygen in peroxides is -1.
Atomic oxygen has oxidation number 0. Molecular oxygen also has 0 as oxidation number. It would be the same for five oxygen molecules as well.
the most common oxidation number for oxygen is -2.
It is a neutral oxide. Oxygen shows -2 oxidation number.
Oxidation number of Li is +1. Oxidation number of oxygen is -2.
The oxidation number of oxygen is -2 in most of its compounds
the answer is -2.Related Information:The oxidation number of oxygen when it appears as an element is 0. The oxidation number in all compounds but peroxides is -2. The oxidation number of oxygen in peroxides is -1.
In the compound Co2O3 cobalt has an oxidation number of 3 while oxygen has an oxidation number is -2.
Atomic oxygen has oxidation number 0. Molecular oxygen also has 0 as oxidation number. It would be the same for five oxygen molecules as well.
Silicon's oxidation number is +4.Oxygen's oxidation number is -2
Hydrogen's oxidation number is +1.Chlorin's oxidation number is +1.Oxygen's oxidation number is -2.
the most common oxidation number for oxygen is -2.
It is a neutral oxide. Oxygen shows -2 oxidation number.
Oxidation number of Li is +1. Oxidation number of oxygen is -2.
In FeO the oxidation number of iron is 2+ and the oxidation number of oxygen is 2-.
in NiO2 the oxidation number for Ni is 4+ and the oxidation number for oxygen is 2-.
I believe K2CO3.