Metalls, non-metals and metalloids
Metalloids: elements who have metallic and non-metallicc properties
Alloys: metals that contain more Tham one element
Living things, plastic: non-metals
Metals
Good conductors of heat
Good conductors of electricity
Strong and tough
High melting and boiling points
Malleable
High density
Ductile
Sonorous
Metallic luster
Metallic elements
Iron, precious metals, copper, aluminium, tin, mercury and lead
Metal alloys
Steel, bronze, brass, solder, pewter
Non-metals
Poor conductors of electricity
Insulators
Poor conductors of heat
Weak and brittle
Low melting and boiling points
Low densities
Gases and lighter than air
Noble gases
Halogens
Nitrogen, Oxygen and Carbon
Wood, porcelain, plastic, glass, leather, rock
Metalloids
Solid at room temperature
Boron, arsenic, silicon, germanium, antimony, tellurium, polonium
Semi-conductors
Uses in electronics
They can behave as a metal or as a non-metal when reacting