Beginner Topic 720 of 1102 Inorganic Chemistry
Inorganic Nomenclature
Rules for naming ionic and molecular compounds using prefixes, suffixes and Roman numerals.
In-depth explanation of Inorganic Nomenclature
Inorganic nomenclature is the systematic naming of compounds using IUPAC rules, and it depends on whether a compound is ionic or molecular. Ionic compounds are named cation first, then anion, with anions ending in -ide for monatomic ions and -ate or -ite for oxoanions. Metals with variable charge carry a Roman numeral, as in iron(III) chloride. Molecular compounds use Greek prefixes such as mono-, di- and tetra-, so N2O4 is dinitrogen tetroxide. Acids replace -ate with -ic and -ite with -ous.
Going deeper: Inorganic Nomenclature
Key ideas: Ionic: name the cation, then anion (-ide); for variable states use Roman numerals (iron(III) chloride, Fe2O3 is iron(III) oxide). Covalent: prefixes mono, di, tri, tetra, penta (CO2, N2O4 dinitrogen tetroxide). Acids: binary hydro-ic (HCl hydrochloric), oxoacids -ic for more O and -ous for fewer (H2SO4, H2SO3), with per- and hypo- extending the series (HClO4 perchloric). Coordination: ligands alphabetical, then metal with oxidation state, in anionic complexes the metal ends in -ate: K4[Fe(CN)6] potassium hexacyanoferrate(II).
Common mistakes and connections: Students add prefixes to ionic names (not dioxygen calcium) or write mono at the start of the first element. Ligand prefixes ignore alphabetical order. Anion names: -ate for oxoanions (sulfate), -ite for fewer oxygens. Formula writing needs charge balancing, with a crisscross method. Links to polyatomic ions, chemical formula types and coordination compounds.
Visualization of Inorganic Nomenclature
The sulfate ion is named from sulfur plus -ate; naming rules use suffixes -ide, -ite and -ate and prefixes like per- and hypo- for oxoanions. The interactive lesson shows this as a live animation or chart.
Worked example and use case
FeCl3 is named iron(III) chloride, and N2O4 is named dinitrogen tetroxide.
Frequently asked questions about Inorganic Nomenclature
What is Inorganic Nomenclature?
Rules for naming ionic and molecular compounds using prefixes, suffixes and Roman numerals.
Is Inorganic Nomenclature a beginner, intermediate or advanced topic?
Inorganic Nomenclature is a beginner topic in Inorganic Chemistry. It needs no earlier chemistry lessons and is a good starting point.
What should I learn before Inorganic Nomenclature?
Study these earlier topics in Inorganic Chemistry first: Quantum Dots, Photovoltaic Materials, Water Treatment.
What comes after Inorganic Nomenclature?
The next topics in Inorganic Chemistry are Polyatomic Ions and Chemical Formula Types.
Can I practise Inorganic Nomenclature with quizzes?
Yes. The interactive lesson includes a self-check question on Inorganic Nomenclature, and the Inorganic Chemistry quiz draws on every topic in this area.
Where Inorganic Nomenclature fits in Inorganic Chemistry
Inorganic Nomenclature is topic 105 of 113 in Inorganic Chemistry.