Metals Flashcards
Properties of Metals
High Conductors
High melting points
Malleable
Ductile
High tensile strengths
Magnetic
Shiny appearance
Sonorous
What are some Metals?
Aluminum
Copper
Iron
Zinc and tin
Silver and gold
Properties of Non Metals
Poor Conductors
Low tensile strengths
Dull in appearance
Low melting points
Types of Non-Metals
Hydrogen
Nitrogen
Oxygen
Sulfur
Natural Materials
Materials that occur naturally, e.g wood and rubber
Synthetic Materials
Materials that are man-made, e.g plastics, glass, ceramics and carbon fibre
Types of Wood
Hardwood
Soft Wood
Uses of Wood
Furniture
Flooring
Window frames
Doors
What are plastics made from?
Chemicals obtained from petroleum
What are plastics made up of?
large molecules called polymers
Electroplating
The process that uses an electric current to coat a metal object using a thin layer of another metal
Factors affecting the rate of rusting
Temperature
Humidity
Salts
Pollutants
Prevention of rusting
Coating- the object with a thin layer of zinc, a process known as galvanising.
Plating - the object with an unreactive metal or a less reactive metal
When does Corrorsion take place?
When the surface of a metal is gradually worn away by reacting with chemicals in the environment
Reaction of metals with dilute acids
salt + hydrogen
