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Ionic Compounds

# Ionic Compounds - Chapter 4 Compounds and Their Bonds 4.3...

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Chapter 4 Compounds and Their Bonds 4.3 Ionic Compounds 4.4 Naming Ionic Formulas

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Ionic Compounds Attraction between + ions and - ions Electrons go from metals to nonmetals electron transfer metal nonmetal ion + ion Electrons lost = Electrons gain
Formulas of Ionic Compounds Formulas of ionic compounds are determined from the charges on the ions atoms ions Na + F : → Na + : F : → NaF sodium fluorine sodium fluoride formula Charge balance: 1+ 1- = 0

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Writing a Formula Write the formula for the ionic compound that will form between Ba 2+ and Cl - . Solution: 1. Balance charge with + and – ions 2. Write the positive ion of metal first, and the negative ion Ba 2+ Cl - Cl - 3. Write the number of ions needed as subscripts BaCl 2
Learning Check Write the correct formula for the compounds containing the following ions: A. Na + , S 2- 1) NaS 2) Na 2 S 3) NaS 2 B. Al 3+ , Cl - 1) AlCl 3 2) AlCl 3) Al 3 Cl C. Mg 2+ , N 3- 1) MgN 2) Mg 2 N 3 3) Mg 3 N 2

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Solution A. Na + , S 2- 2) Na 2 S B. Al 3+ , Cl - 1) AlCl 3 C. Mg 2+ , N 3- 3) Mg 3 N 2
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