Section 2.8 Naming Simple Compounds Return to TOC 1 Formed between two nonmetals. 1.The first element in the formula is named first, using the full element name. 2.The second element is named as if it were an anion. 3.Prefixes are used to denote the numbers of atoms present. 4.The prefix mono- is never used for naming the first element. Binary Covalent Compounds (Type III)

Section 2.8 Naming Simple Compounds Return to TOC 2 Prefixes Used to Indicate Number in Chemical Names

Section 2.8 Naming Simple Compounds Return to TOC 3 Examples: CO 2 Carbon dioxide SF 6 Sulfur hexafluoride N 2 O 4 Dinitrogen tetroxide Binary Covalent Compounds (Type III)

Section 2.8 Naming Simple Compounds Return to TOC Examples N 2 O dinitrogen monoxide NO nitrogen monoxide NO 2 nitrogen dioxide N 2 O 4 dinitrogen tetroxide PCl 5 Phosphorous pentachloride 4

Section 2.8 Naming Simple Compounds Return to TOC 5 Exercise What is the name of the compound SeO 2 ? a)selenium oxide b)selenium dioxide c)selenium(II) oxide d)selenium(IV) dioxide

Section 2.8 Naming Simple Compounds Return to TOC 6 Exercise A compound has the formula XCl 3 where X could represent a metal or nonmetal. What could the name of this compound be? a)phosphorus trichloride b)carbon monochloride c)tin(IV) chloride d)magnesium chloride

Section 2.8 Naming Simple Compounds Return to TOC Concept Check Name the following Covalent Compounds CO 2 SF 6 N 2 O 4 Carbon dioxide Sulfur hexafluoride Dinitrogen tetroxide Answers 7

Section 2.8 Naming Simple Compounds Return to TOC 8 Exercise Which of the following compounds is named incorrectly? a) KNO 3 potassium nitrate b) TiO 2 titanium(II) oxide c) Sn(OH) 4 tin(IV) hydroxide d) PBr 5 phosphorus pentabromide e) CaCrO 4 calcium chromate

Section 2.8 Naming Simple Compounds Return to TOC 9 Exercise – mixed review Examine the following table of formulas and names. Which of the compounds are named correctly? a)I, II b)I, III, IV c)I, IV d)I only FormulaName IP2O5P2O5 Diphosphorus pentoxide IIClO 2 Chlorine oxide IIIPbI 4 Lead iodide IVCuSO 4 Copper(I) sulfate

Section 2.8 Naming Simple Compounds Return to TOC 10 Flowchart for Naming Binary Compounds