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Binary Covalent Compounds (Type III)

Binary Covalent Compounds (Type III). 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.

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Binary Covalent Compounds (Type III)

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  1. Binary Covalent Compounds (Type III) • 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.

  2. Prefixes Used to Indicate Number in Chemical Names

  3. Binary Covalent Compounds (Type III) • Examples: CO2 Carbon dioxide SF6 Sulfur hexafluoride N2O4 Dinitrogen tetroxide

  4. Covalent Prefixes Examples N2O dinitrogen monoxide NO nitrogen monoxide NO2 nitrogen dioxide PCl5 Phosphorous pentachloride N2O4 dinitrogen tetroxide

  5. Exercise What is the name of the compound SeO2? a) selenium oxide b) selenium dioxide c) selenium(II) oxide d) selenium(IV) dioxide

  6. Exercise A compound has the formula XCl3 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

  7. Naming Covalent Compounds Concept Check Name the following Covalent Compounds CO2 SF6 N2O4 Carbon dioxide Sulfur hexafluoride Dinitrogen tetroxide Answers

  8. Exercise Which of the following compounds is named incorrectly? • KNO3 potassium nitrate • TiO2 titanium(II) oxide • Sn(OH)4 tin(IV) hydroxide • PBr5 phosphorus pentabromide • CaCrO4 calcium chromate

  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

  10. Flowchart for Naming Binary Compounds

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