C2.3.4 Properties of Metals and Alloys

• The ability of a metal to be hammered into thin sheets is called malleability
• What does electrical conductivity measure in metals?

  Ability to conduct electricity
• What are alloys created from?

  Mixtures of two or more elements
• What are the components of stainless steel?

  Iron, chromium, nickel
• Ductility refers to the ability of a metal to be drawn into wires.


  True
• The ability of a metal to conduct heat efficiently is called thermal conductivity
• What are alloys created from?

  Mixtures of two or more elements
• The malleability of metals allows them to be hammered into thin sheets
• Alloys find applications in construction, transportation, manufacturing, and electronics
• Malleability is enhanced in some alloys


  True
• What are metals used for due to their thermal conductivity?

  Heat sinks
• Arrange the following metals in order of reactivity from most reactive to least reactive:

  1️⃣ Sodium (Na)

  2️⃣ Iron (Fe)

  3️⃣ Copper (Cu)

  4️⃣ Gold (Au)
• Copper oxide (CuO) is formed when copper reacts with oxygen
• Alloys are preferred over pure metals because of their improved strength
• What two metals are combined to create brass?

  Copper and zinc
• Malleability and ductility are key properties of metals


  True
• Alloys are mixtures of two or more elements
• Match the property of a pure metal with its enhancement in an alloy:

  Strength ↔️ Improved hardness in alloys

  Corrosion Resistance ↔️ Increased durability in alloys
• What are alloys made of?

  Two or more elements
• Stainless steel is an alloy of iron, chromium, and nickel.


  True
• Metals react with oxygen to form metal oxides
• What are the two common oxides formed by iron?

  Fe₂O₃ and Fe₃O₄
• Alloys typically have lower strength than pure metals.

  False
• Duralumin, used in aircraft construction, is an alloy of aluminum, copper, manganese, and magnesium
• What are the key properties of metals?

  Shiny, malleable, ductile
• Ductility refers to the ability of a metal to be drawn into wires.


  True
• The ability of a metal to conduct heat efficiently is called thermal conductivity
• Stainless steel is an alloy of iron, chromium, and nickel.


  True
• The ability of a metal to be hammered into thin sheets is called malleability
• What does electrical conductivity measure in metals?

  Ability to conduct electricity
• Metals are malleable, which means they can be hammered into thin sheets.


  True
• What are the components of stainless steel?

  Iron, chromium, nickel
• What is the term for the ability of metals to be drawn into wires?

  Ductility
• Match the physical property with its description:

  Malleability ↔️ Ability to be hammered into thin sheets

  Ductility ↔️ Ability to be drawn into wires

  Electrical Conductivity ↔️ Ability to conduct electricity efficiently

  Thermal Conductivity ↔️ Ability to conduct heat efficiently
• Electrical conductivity in metals can be adjusted
• Metals react with oxygen to form metal oxides in a process called oxidation

  True
• What is the oxide formed when sodium reacts with oxygen?

  Sodium oxide (Na₂O)
• The formation of metal oxides can affect a compound's color and hardness


  True
• Match the pure metal with its corresponding property in an alloy:

  Iron ↔️ Improved corrosion resistance in stainless steel

  Copper ↔️ Enhanced strength in brass
• Metals are defined as shiny, malleable, and good conductors of heat and electricity