Student_03_2 - ACTIVITY 03-2 Nomenclature: Naming Compounds...

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34 W HY ? The term nomenclature refers to a system of principles, procedures, and terms for naming things. Names are an intrinsic part of the way we communicate information. So in order to talk about chemical compounds, which are substances formed from two or more different elements, in a meaningful way, they need to have names that that tell us something about their composition or molecular formula. L EARNING O BJECTIVE Understand and apply the nomenclature for binary ionic compounds, binary covalent com- pounds, strong acids, and polyatomic ions S UCCESS C RITERIA Correctly write the molecular formula when given the name of a compound Correctly name a compound when given its molecular formula P REREQUISITES Activity 02-3: Periodic Table of the Elements Activity 03-1: Molecular Representations I NFORMATION Electronegativity is a measure of the ability of an atom to attract electrons in a molecule. A chart of electronegativity values is provided on the back cover of this book. Electrons in a bond are pulled toward the atom that has the larger electronegativity. If the electronegativities of two elements are not too different, which generally means a difference less than or equal to 1.9, then electrons are shared between the two atoms, and the compound is called covalent. If the difference in electronegativities is greater than 1.9, then the more electronegative atom attracts one or more
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Student_03_2 - ACTIVITY 03-2 Nomenclature: Naming Compounds...

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