1. Section 4-2 What gives metals their distinctive properties?

2. Characteristics of Metals
Elements that are shiny, malleable, ductile and good conductors of heat and electricity
Malleable – hammered or rolled into sheets
Ductile – can be drawn into wires
The properties of metal depend on the unique configuration of electrons, protons, and neutrons
Alloy – a solid or liquid solution of two or more metals
brass
Steel

3. More on Metals
Atoms of metal usually have three electrons in their outermost energy level
Metallic Bonding – positively charged metallic ions are surrounded by a sea of electrons

4. Crystals
Crystals – a substance in which the atoms or molecules are arranged in an orderly geometric, repeating pattern
The outer electrons in atoms bind together in a crystal
These electrons are in orbitals
Electrons in the higher orbitals are free to move throughout the crystal this forms the conduction band

5. Metalloids (Semiconductors)
The Conduction Band
A band in which electrons must move to allow electrical conduction
Similar to the sea of electrons
Metals
Metalloids (Semiconductors)
Nonmetals

6. The Structure of Metallic Crystals
Atoms pack together in the densest fashion
Think of it as fruits in a basket