1. Chemical Bonds
Force of attraction between two atoms

2. Ionic Bonds
Occur in ionic compounds generally between a metal and a nonmetal
Formed when electrons are transferred
Strong bond
High melting point
Generally solids
Poor conductors of electricity as a solid, but good conductors when dissolved

3. Covalent Bonds
Generally occur in molecular compounds between two nonmetals
Formed when electrons are shared
Weak bonds
Low melting points
Usually liquids or gases
Poor conductors of electricity

4. Which of the following compounds contains ionic bonds?
NaCl NO F2
SO3
Answer Now

5. Sharing in covalent bonds
Electronegativity determines how electrons are shared
Uneven sharing = polar bond
Even sharing = nonpolar bond

6. Metallic Bonds Occur between atoms of a metal of the same element.
Strong bonds
Have all of the properties of metals discussed with the periodic table

7. Lewis Structures (Dot Diagrams)
Used to show the arrangement of atoms in molecules or ions
Follow the next steps to draw Lewis structures

8. Steps for drawing Lewis structures
Count the number of valence electrons in the molecule or ion
Arrange the atoms around a central atom
Put a pair of electrons (2 dots) where each bond occurs
Put the remaining electrons around each atom so all have 8 except hydrogen which can only have 2

9. Molecular Shapes

10. Molecular Structure Worksheet Molecules
Carbon tetrabromide
Phosphorus trichloride
Hydrogen sulfide
Chlorine molecule (Cl2)
Sulfur dichloride
Carbon monoxide
Ethane (C2H6)
Silicon dioxide
Hydrogen cyanide
Chlorine trifluoride

11. What happens when oil is put in water?
Like Dissolves Like

12. Cell Membranes

13. Hydrogen Bonds
Bond that occurs between molecules containing hydrogen and an atom with a high electronegativity (usually N, O, F, Cl, or S)