Ionic Lewis Structures 2015.notebook
March 18, 2016
DO NOW
Identify the type of bond found in each of the following substances:
H2
Lewis Structures for Ionic Compounds
Aim: To show the formation of ions after the electron transfer.
KCl
Na
HF
Dec 2­5:18 PM
Ionic Compounds
Ionic bonds will have a difference in electronegativity of 1.7 or greater. The greater the difference in E.N., the stronger the ionic bond.
Which bond is more ionic? NaCl or KCl?
Dec 2­5:18 PM
Ionic Compound Properties
Physical properties:
­Crystal lattice structure
­Brittle solids
­High melting point and high boiling point.
­Dissociates in water (ions break apart when dissolving)
NaCl (aq) ­­> Na+ (aq) + Cl­ (aq)
­
Conduction: Poor conductors as solids because the ions cannot move, but great conductors when dissociated in water or when molten because the ions are mobile.
Dec 2­5:18 PM
Dec 2­5:18 PM
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Ionic Lewis Structures 2015.notebook
Ionic Bonds
March 18, 2016
Lewis Dot Diagram
Barium Chloride
1. Draw the electron dot diagram for each individual
atom, then show the transfer of electrons from the
metal to nonmetal.
• In an ionic bond the metal transfers an electron to the nonmetal.
• Each ion formed now has a stable octet and the opposite charges attract to each other to create the bond.
Dec 1­5:12 PM
2. a) During the electron transfer, all of the metals
valence electrons must be lost to have a stable
octet.
b)The nonmetal must gain enough valence electrons
to have a stable octet.
c) Make sure you have enough of each metal and
nonmetal so the charges balance!!
3. Draw charges and brackets on each ion formed.
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Ionic Electron Dot Structures
1) K3N
2) CaCl2
3.) AlF3
4.) NaCl
.
Dec 2­5:18 PM
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