Do Now Identify ionic compounds CO 2 MgCl 2 NH 4 Cl NaOH NH 3 CH 4 CuSO 4 HF Magnesiums outer shell is now empty Fluorines outer shell is now full Lewis Diagrams for Ionic Compounds ID: 812518
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Slide1
Topic: Lewis Dot Diagrams for Ionic Compounds
Do Now: Identify ionic compoundsCO2MgCl2NH4ClNaOH
NH
3
CH
4
CuSO
4
HF
Slide2Magnesium’s outer shell is now empty
Fluorine’s outer shell is now full
Slide3Lewis Diagrams for Ionic Compounds
NaCl's Lewis structure:
[Na]
+1
[
Cl
]
-1
•
•
•
•
•
•
•
•
Remember: Lewis diagrams show valence electrons!
Slide4Predicting 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
••
••
•
•
•
•
Slide5Ca
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
Lewis Diagram of
Calcium Iodide
··
··
··
··
Chemical Formula = ______
CaI
2