Chemical Nomenclature Sodium chloride NaCl Carbon dioxide CO2 Copper(II) chloride CuCl2 Chemical Nomenclature Naming compounds and writing the formulas of compounds

3 Sets of Rules of Naming Rules Class or Type I - Ionic Bond between metal predictable + charge and a negative nonmetal or polyatomic ion ; name cations, anion ends in “ide” Examples: NaCl – sodium chloride ; MgCl2, magnesium chloride Class or Type II- Ionic Bond with variable oxidation state transition metal; Roman numerals used to specify charge of transition metal Example: CuCl2 – copper(II) chloride Class or Type III – Covalent bonds between Two nonmetals; uses prefixes Example: CO2 – carbon dioxide; N2O4 – dinitrogen tetroxide

Naming Rules “Short version” CLASS OR TYPE 1: NAME THE IONS Example: MgCl2 magnesium chloride CLASS OR TYPE 2: ROMAN NUMERALS Example: CuCl2 copper(II) chloride CLASS OR TYPE 3: PREFIXES Example: CO2, carbon dioxide

Location of First Element in Formula determines class rules +1 Class or Type I +2 +3 Class or Type II Class or Type III +1 +2

Location of First Element in Formula determines class rules +1 Class or Type I +2 +3 Class or Type II Class or Type III +1 +2

Location of First Element in Formula determines class rules +1 Class or Type I +2 +3 Class or Type II Class or Type III +1 +2

Homework 2-9 SnBr4 ___ AlH3 ___ FeO ___ OF2 ___ XeF6 ___ Ca3N2 ___ CBr4 ____ MnF2 ____ Lithium oxide ____ diboron hexachloride ___ Copper(I) hydroxide ___ barium nitrate ___ Cobalt(II) sulfate ____ sulfur dioxide ____

Homework 2-9 SnBr4 ___ AlH3 ___ FeO ___ OF2 ___ II I II III SnBr4 ___ AlH3 ___ FeO ___ OF2 ___ XeF6 ___ Ca3N2 ___ CBr4 ____ MnF2 ____ Lithium oxide ____ diboron hexachloride ___ Copper(I) hydroxide ___ barium nitrate ___ Cobalt(II) sulfate ____ sulfur dioxide ____ III I III II I III II I II III