Topic: Lewis Dot Diagrams for Ionic Compounds

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Presentation transcript:

Topic: Lewis Dot Diagrams for Ionic Compounds Do Now: Identify ionic compounds CO2 MgCl2 NH4Cl NaOH NH3 CH4 CuSO4 HF

Magnesium’s outer shell is now empty Fluorine’s outer shell is now full

Lewis Diagrams for Ionic Compounds NaCl's Lewis structure: [Na]+1[ Cl ]-1 • • • • • • • • Remember: Lewis diagrams show valence electrons!

Predicting Ionic Compounds What is the ionic compound formed from calcium and iodine? Calcium - metal - 2 valence electrons - loses both electrons  [Ca]+2 Iodine - nonmetal - 7 valence electrons - gains 1 electron  [ ‍I ]-1 •• • • • • •• How many iodine ions do you need to make a neutral compound? 2

Lewis Diagram of Calcium Iodide Ca 2-8-8-2 → Ca+2 2-8-8-0 I 2-8-18-18-7 → I-1 2-8-18-18-8 [Ca]+2[:I:]-1[:I:]-1 Note: total charge adds up to zero +2 -1 -1 = 0 - ionic compounds are neutral Chemical Formula = ______ ·· ·· CaI2 ·· ··