Ionic Compounds. Ion:Any atom that has a charge Cation: An ion with a + charge anion: An ion with a - charge.

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Presentation transcript:

Ionic Compounds

Ion:Any atom that has a charge Cation: An ion with a + charge anion: An ion with a - charge

Ionic Bonds A bond that forms between (+) metals and (-) non metals. Electrons are transferred and then the opposite charges attract.

Octet Rule Element always move to become more stable. Most elements change their electron configuration to match the configuration of noble gasses. Elements want 8 valence electrons

Rules for Naming Ionic Compounds 1. The first element (metal) name does not change. 2. The second elements name ending changes to -ide NaO MgCl 2 Al 2 S 3

Rules for Naming Ionic Compounds (except for polyatomic ions, use the name on the chart) SO 4 2- = sulfate Na 2 SO 4 = sodium sulfate

Rules for Naming Ionic Compounds 3. If it is a transition metal Roman Numerals must be used. FeCl FeCl 2 FeCl 3 The Roman numeral tells you the charge of the transition metal

Rules for Naming Ionic Compounds 4. There are no prefixes in ionic compounds

Rules for Writing Ionic Compounds 1.Charge must always cancel out + and – charges add up to zero. 2. Find the charges from the periodic table or the chart.

Rules for Writing Ionic Compounds 3.If the charges are the same they cancel out and it is a one to one ratio. Ca 2+, O 2- Ca 1 O 1

Rules for Writing Ionic Compounds 4.If the charges are not the same then use the cross rule Ca 2+ Cl 1- Ca 1 Cl 2