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

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)

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)

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

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