2.6 Flashcards
Polymers
High relative molecular mass, made by linking together monomers (small molecules)
Made from very long carbon chains
What are monomers bonds
Covalent
Polymers are ….. at room temp
Solid bc of intermolecular forces.
Giant covalent structures (macromolecules)
Huge number of non metal atoms bonded to other non metal atoms with string covalent bonds. Also called giant lattices with fixed ratio on overall structure.
Properties of giant covalent structures
-High melting and boiling point, strong covalent bonds
-Most can’t conduct electricity, no free electrons. (Graphite and graphene only excepción
What are Diamond, graphite, buckerministerfuller and graphene made of
carbon
Metallic bonds
Very strong attraction between positive ions and negative delocalized electrons within metal lattice structure.
Metal properties
High melting and boiling points
Insoluble in water
Good heat and electricity conductors (delocalized electrons)
Malleable (layers can Slide Over each other)
Alloy
Mixtures of metals, mixed together physically but not chemically
Alloy properties
-Greater strength, hardness, resistance to heat, than metals
-Contains atoms of different sizes, distorts perfect arrangement (makes layers harder to Slide Over each other so they are harder)
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Why are metals good conductors of electricity?
Free electrons(delocalized, mobile) that move and can carry charge through lattice structure
Copper is very good conductor
Why are metals good conductors of heat (thermal)?
Delocalized electron supply free to move and carry thermal energy.
What metal is a good electrical and thermal conductor
Copper
