alloys

• What is the definition of an alloy?

  An alloy contains a metal blended with other elements
• How is an alloy made?

  By melting metal and mixing in other elements
• Why are alloys generally harder than pure metals?

  Different sized atoms disrupt atomic layers
• What are the two alloys of copper mentioned?

  Bronze and brass
• What is bronze made of?

  Bronze is an alloy of copper and tin
• Why is bronze used for statues?

  Because it is extremely hard and corrosion-resistant
• What is brass made of?

  Brass is an alloy of copper and zinc
• What are the uses of brass?

  Used for musical instruments and door handles
• Why is pure gold alloyed with other metals?

  To make it harder for jewelry
• What metals are commonly used to alloy with gold?

  Silver, copper, and zinc
• How is the purity of gold rated?

  In carats, such as 24 or 18 karat
• What is the composition of 24 karat gold?

  100% pure gold
• What is the composition of 18 karat gold?

  75% gold
• What is steel primarily made of?

  Iron and carbon
• What is high carbon steel known for?

  It is extremely hard but brittle
• What is high carbon steel used to make?

  Cutting tools such as chisels
• What is low-carbon steel known for?

  It is softer and easily shaped
• What is low-carbon steel used to make?

  Car bodies
• What additional metals are found in stainless steel?

  Chromium and nickel
• What is the benefit of stainless steel?

  It is hard and resistant to corrosion
• What are aluminium alloys known for?

  Low density
• Where are aluminium alloys commonly used?

  In aeroplane bodies
• What are the properties of alloys compared to pure metals?

  • Alloys are generally harder than pure metals
  • Alloys have disrupted atomic layers
  • Alloys are less malleable than pure metals
• What are the uses of different forms of steel?

  • High carbon steel: cutting tools (chisels)
  • Low carbon steel: car bodies
  • Stainless steel: kitchen utensils, medical instruments
• What are the uses of bronze, brass, and gold alloys?

  • Bronze: statues
  • Brass: musical instruments, door handles
  • Gold alloys: jewelry