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Understanding Covalent Compound Formulas: Naming and Writing Guide

Learn the basics of chemical formulas for covalent compounds, including names and writing rules. Understand how to name molecular compounds, write covalent compound formulas, and differentiate between binary and ternary acids.

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Understanding Covalent Compound Formulas: Naming and Writing Guide

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  1. Chemical Formulas COVALENT/MOLECULAR COMPOUNDS

  2. Chemical Formulas • Chemical formula - a symbolic representation of chemical compounds; contains: • elements in compound (symbols) • # of atoms in each element • NaCl – sodium-one atom & chlorine-one atom • H2O – Hydrogen-2 atoms & oxygen-one atom

  3. Types of Chemical Formula • Ionic • Giving and Taking of Electrons • Covalent • Share of electrons

  4. Covalent – non-metal and non-metal → sharing of electrons (e-) Types of Chemical Formulas Oxidation numbers do NOT apply

  5. Naming Molecular/CovalentCompounds • anion (-) + anion (-) • Name is determined by the subscript • CO2 • Carbon Dioxide • N2O • Dinitrogen monoxide • Naming Covalent Compounds • Begin with name of first Anion • Elements name + prefix determined by the subscript • NEVER use “mono” • End with name of second Anion • Elements name + prefix determined by the subscript

  6. Writing Formulas and Naming Covalent Compounds

  7. Acid Compounds • Two Types of Acids: • Hydrogen + • Binary (single anion) • Ternary (negative polyatomic ion)

  8. Binary Acids • Examples • HCl hydrogen + chlorine Hydrochloric • HBr • Naming Binary Acids • Change the first element - hydrogen to “hydro” – • Change the 2nd element’s ending to –”ic”

  9. Writing Binary and Ternary Formulas

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