1. Substances’ properties depend on their bonds.
Chapter 2, section 2.3
Substances’ properties depend on their bonds.

2. Metals have unique bonds
Metal atoms bond together by sharing their electrons.
The atoms share electrons equally.
Metallic Bond: The bond between metal atoms which the sharing of electrons allows the electrons to move easily among the atoms (a sea of electrons)

3. Properties of Metals
Properties of metals are determined by their metallic bonds.
Good conductors of electricity
Good conductors of heat
High melting points (takes a higher temperature for it to melt)
Malleable (easily shaped)
Ductile (easily stretched)

4. The properties of the compound depend on the chemical bonds.
Ionic:
Solid at room temperature
High melting and boiling points
Hard, Brittle
When dissolved, good conductors of electricity
Covalent:
Usually not solid at room temperature (liquid or gas)
Low melting and boiling points
Poor conductors of electricity

5. Bonds can make the same element look different.
Carbon: diamond, graphite, fullerine