Structure

• What should you be able to describe by the end of the video?

  Metallic bonding and the properties of pure metals and alloys
• Why are metals important in chemistry?

  They have unique properties that are essential for various applications
• What is an example of pure metal mentioned in the video?

  Gold
• What is an example of an alloy mentioned in the video?

  A guitar string
• What happens to atoms when they achieve a full outer energy level?

  They become stable
• What type of bonding occurs when a metal atom reacts with a non-metal atom?

  Ionic bonding
• What type of bonding occurs when two non-metal atoms react?

  Covalent bonding
• How are atoms arranged in metals?

  In a giant structure arranged in regular layers
• What does it mean for electrons in metals to be delocalized?

  They are free to move through the whole structure
• How many protons are in a lithium atom?

  Three
• What happens to the outer electrons in metal atoms?

  They are not attached to any individual atom and can move freely
• What are delocalized electrons in metals referred to as?

  A sea of delocalized electrons
• What do we call the positive metal ions formed in metallic bonding?

  Positive metal ions
• What is the nature of the attraction between delocalized electrons and positive metal ions?

  It is a strong electrostatic attraction
• What is the term used for the attraction in metallic bonding?

  Metallic bond
• Why do metals have high melting and boiling points?

  Because breaking strong metallic bonds requires a great deal of energy
• Why are metals excellent conductors of heat and electricity?

  Because delocalized electrons can move and carry charge and thermal energy
• What allows metals to be bent and shaped?

  The layers of atoms can slide over each other
• What is an alloy?

  A mixture of metals
• How do different sizes of atoms in an alloy affect its properties?

  They distort the layers, making it harder for them to slide over each other
• Why are alloys harder than pure metals?

  Because the distortion of layers makes it more difficult for them to slide
• What are the properties of metals?

  • High melting and boiling points
  • Excellent conductors of heat and electricity
  • Can be bent and shaped
• What are the properties of alloys compared to pure metals?

  • Alloys are harder than pure metals
  • Different sizes of atoms distort layers
  • Layers slide less easily in alloys
• What is the difference between ionic, covalent, and metallic bonding?

  • Ionic bonding: occurs between metals and non-metals
  • Covalent bonding: occurs between non-metals
  • Metallic bonding: involves delocalized electrons in metals