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Chemical Nomenclature

Chemical Nomenclature. Unit 4. Naming Type I Binary Compounds. Binary compound Made up of 2 elements consisting of a cation and an anion to make a Binary Ionic Compound Made of a metal and non-metal element. Rules for Naming Type I Ionic Compounds.

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Chemical Nomenclature

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  1. Chemical Nomenclature Unit 4

  2. Naming Type I Binary Compounds • Binary compound • Made up of 2 elements consisting of a cation and an anion to make a Binary Ionic Compound • Made of a metal and non-metal element

  3. Rules for Naming Type I Ionic Compounds • 1. The cation is always named first and the anion second • 2. A simple cation (obtained from a single atom) takes its name from the name of the element. For example: Na+ is called sodium in the name of compounds containing this ion • 3. A simple anion (obtained from a single atom) is named by taking the first part of the element name (the root) and adding –ide. Thus the Cl- ion is called Chloride • 4. Write the name for the compound by combining the names of the ions

  4. Table 1: Common Simple Cations and Anions

  5. Examples

  6. Type II – Naming Binary Ionic Compounds that contain metals that form more than one type of cations • This type of compound contains a metal that can form more than one type of cation (Transition metals) • Differs from the Type I in that you place the Roman Numeral in the name • The Roman numeral tells the charge on the ion, not the number of ions present in the compound

  7. Examples • CuCl • Cu(I) chloride • HgO • Mercury (II) oxide

  8. Type III – Naming binary compounds that contain only nonmetals • 1. The first element in the formula is named first, and the full element name is used • 2. The element is named as though it were an anion • 3. Prefixes are used to denote the numbers of atoms present. These prefixes are given in the following table • 4. The prefix mono- is never used for naming the first element. • For example: CO is called carbon monoxide, not monocarbon monoxide

  9. Prefixes Used to Indicate Numbers in Chemical Names

  10. Examples • NO • Nitrogen monoxide • N2O5 • Di nitrogen pentaoxide • SF6 • Sulfur hexafluoride • SO2 • Sulfur dioxide • P4O6 • Tetra phosphorus hexaoxide

  11. Review • Type I • Ionic compounds with metals that always form a cation with the same charge • Type II • Ionic compounds with metals (usually transition metals) that form cations with various charges • Type III • Compounds that contain only nonmetals

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