Oxidation Rules Flashcards
1
Q
Elements
A
The oxidation number of an atom in an element is zero.
2
Q
Monatomic ions
A
The oxidation number of an atom in a monatomic ion equals the charge on the ion.
3
Q
Oxygen
A
The oxidation number of oxygen is -2 in most of its compounds.
4
Q
Hydrogen
A
The oxidation number of hydrogen is +1 in most of its compounds.
5
Q
Halogens
A
The oxidation number of fluorine is -1 in all of its compounds. Each of the other halogens (Cl, Br, I) has an oxidation number of -1 in binary compounds, except when the other element is another halogen above it in the periodic table or the other element is oxygen.
6
Q
Compounds
A
The sum of the oxidation numbers of the atoms in a compound is zero.
7
Q
ions
A
The sum of the oxidation numbers of the atoms in a polyatomic ion equals the charge on the ion.
