0 in elemental form
+3 in most of its stable compounds
Oxidation number is +3 for Au+3 ion
79
+3 for gold -3 for arsenic
This is iron II, III oxide and features iron in both the 2+ and 3+ oxidation states.
The oxidation number of Al is +III and S is -II.
Cobalt has an oxidation number of 3 (III) in the compound Co2O3.
The oxidation number is a measure of the charge an atom would have if all its bonds were 100% ionic. It can be positive, negative or zero.
+3 for gold -3 for arsenic
This is iron II, III oxide and features iron in both the 2+ and 3+ oxidation states.
+3 is the oxidation no of iron(III)
The oxidation number of Al is +III and S is -II.
'Oxidation number' and oxidation state are often used interchangeably. Oxidation state is a formal way of determining the degree of oxidation of an atom or ion or molecule; for ions the oxidation number is equal to the ionic charge. In non ionic compounds the most electronegative element is assumed to "own" the electrons. So in say InP which is a semiconductor and not ionic, the oxidation state of indium is +III and P is -III. Oxidation number is a convention used in complexes. Ligands are removed from the ion with all bonding electrons. Often the oxidation number and oxidation state have the same values but calculating the the oxidation number of N in ammonia, H is removed as hydride ion, H- you get the strange looking result of nitrogen with an oxidation number of +3. In contrast the oxidation states of N and H would be calculated as -III and +1
'Oxidation number' and oxidation state are often used interchangeably. Oxidation state is a formal way of determining the degree of oxidation of an atom or ion or molecule; for ions the oxidation number is equal to the ionic charge. In non ionic compounds the most electronegative element is assumed to "own" the electrons. So in say InP which is a semiconductor and not ionic, the oxidation state of indium is +III and P is -III. Oxidation number is a convention used in complexes. Ligands are removed from the ion with all bonding electrons. Often the oxidation number and oxidation state have the same values but calculating the the oxidation number of N in ammonia, H is removed as hydride ion, H- you get the strange looking result of nitrogen with an oxidation number of +3. In contrast the oxidation states of N and H would be calculated as -III and +1
Cobalt has an oxidation number of 3 (III) in the compound Co2O3.
The oxidation number is a measure of the charge an atom would have if all its bonds were 100% ionic. It can be positive, negative or zero.
Metallic aluminium has the oxidation number zero. In compounds in the form of ions, it takes the oxidation number +III.Metallic aluminium has the oxidation number zero. In compounds in the form of ions, it takes the oxidation number +III.
The oxidation number of O in any elemental form (e.g. O2, O3) is zero. Typically in chemical compounds the oxidation number of O is -2 (oxide ion)
Oxidation number is usually taken to be the notional charge of an atom following a predetermined set of rules to assign electrons. As such it is an electron counting formalism. Wikipedia has a confusing write up which has been ultimately caused by IUPAC who have contradictory definitions in their naming and gold book documentation. The rules in wikipedia are a commonly applied set- although some chemists adhere to different rules that assign electrons to the most electronegative atom- it depends where you were taught. In coordination chemistry, the oxidation number of a central atom in a coordination compound is the charge that it would have if all the ligands were removed along with the electron pairs that were shared with the central atom. The oxidation number (previously called the Stock number, is used in the nomenclature of inorganic compounds. It is represented by a Roman numeral. The oxidation number is placed either as a right superscript to the element symbol, for example FeIII, or in parentheses after the name of the element, iron(III): in the latter case, there is no space between the element name and the oxidation number. Check the related source for more information.
Ox(N)= -3