longquiz

    Cards (35)

    • What is matter defined as according to Merriam-Webster?

      Consisting of matter
    • How does Cambridge define matter?

      A physical substance that things can be made from
    • What are engineering materials used for?

      They are used in the construction of man-made structures and components
    • How are materials classified?

      Based on their size, composition, physical, and chemical properties
    • What is a metal defined as?

      A pure substance (element) that predominantly forms positive ions by losing electrons
    • What are the physical properties of metals?

      They are mostly opaque, hard, heavy, ductile, and have luster
    • What defines an alloy?

      An alloy is a metallic substance composed of two or more elements
    • What is the composition of an alloy?

      It consists of a primary metal plus impurities
    • Why do alloys have superior physical properties compared to pure metals?

      Because they are composed of multiple elements
    • What type of bonding do metals and alloys exhibit?
      Metallic bonding
    • How is metallic bonding in alloys different from pure metals?

      It is slightly more complex due to the mixture of different atoms
    • What does the sea of electrons model explain?

      It explains metallic bonding and approximates the malleability and ductility of metals
    • What are two physical properties of metals?
      Malleable and ductile
    • Why do metals conduct electricity and heat?

      Due to the overlapping valence band and conduction band, allowing electrons to flow easily
    • What happens to atoms in a lattice when heated?

      They vibrate, resulting in efficient heat transfer
    • What is the valence band?

      Where electrons can be found
    • What is the conduction band?

      Where electrons can move freely
    • What are some real-life examples of metals and alloys?

      • Cookwares
      • Jewelries
      • Medals
    • How are polymers classified?

      Based on certain factors
    • What are the types of polymers based on origin?

      • Natural
      • Semi-Synthetic
      • Synthetic
    • What are the types of polymers based on structure?

      1. Linear
      2. Branched
      3. Cross-linked
      4. Network
    • What is a linear polymer?

      A polymer with monomers arranged in a long and straight chain
    • What is a branched polymer?

      A polymer with additional monomers attached to the main chain
    • What is a cross-linked polymer?

      A polymer with individual chains linked together in a three-dimensional framework
    • What is a network polymer?

      A polymer with high cross-linking resulting in a tightly connected framework
    • What are the types of polymers based on thermal behavior?

      • Thermoplastic
      • Thermosetting plastic
    • What are the properties of elastomers?

      • Rubber-like
      • Stretched cross-linked
    • What are the properties of fiber-reinforced polymers?

      • Thread-like
      • High tensile strength
    • What are the properties of thermoplastics?

      • Melted and reshaped repeatedly
      • Reusable
    • What are the properties of thermosetting plastics?

      • Irreversible hardening upon heating
      • Extensive chain cross-linking
    • What molecular forces are present in elastomers?

      London dispersion force
    • What molecular forces are present in fiber-reinforced polymers?

      Strong covalent bonds
    • What molecular forces are present in thermoplastics?
      London dispersion force
    • What molecular forces are present in thermosetting plastics?

      Strong covalent bonds
    • What are the properties of thermoplastics compared to thermosetting plastics?

      • Thermoplastics can be reshaped and reused
      • Thermosetting plastics undergo irreversible hardening
    See similar decks