c2 elements, compunds and mixtures

  • Created by: faiqa1331
  • Created on: 21-10-18 13:19
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  • c2 elements, compunds and mixtures
    • seperating mixtures
      • filtration
        • seperates a solid from a liquid
        • insoluble substance froms residue
        • soluble substance goes through filter paper as filtrate
      • crystallisation
        • produces dry sample of soluble substance
        • solution is heated
        • solvent evaporates
      • simple distillation
        • seperates a solvent from a solution
        • evaporation > cooling > condensing
      • fractional distillation
        • seperates a liquid from a mixture of liquids
        • evaporation > cooling at different temperatures > condensing
      • chromatorgraphy
        • stationary phase
        • mobile phase
        • substance distrubuted between phases
    • nanoparticles
      • 1 nm - 100 nm across
      • very large surface area to volume ratio
    • carbon allotropes
      • diamond
        • 4 covalent bonds per carbon atom
        • giant covalent lattice
        • hard
        • no delocalied electrons
        • does not conduct electricity
      • graphite
        • 3 covalent bonds per carbon atom
        • layered structure with weak forces betweek layers
        • sofft and slippery
        • delocalised elctrons
        • good conductor of heat
    • structure and change of state
      • metals
        • strong
        • high melting and boling points
        • conducts electricity when solid or liquid
        • metallic bonds
        • malleable
      • ionic compounds
        • strong
        • high melting and boiling points
        • brittle
        • conducts electricity when molten or dissolved
      • giant covalent structures
        • strong
        • high melting and boiling points
        • doesnt conduct electricity except graphite
      • simple molecules
        • weak
        • low melting and boiling points
        • conducts electricity
    • metals and non-metals
      • metals
        • shiny
        • solid at room temperature
        • malleable
        • forms + ions
        • metallic bonding
      • non-metals
        • dull
        • brittle
        • insulators
        • forms - ions
        • covalent bonding
    • bonds
      • covalent
        • non-metals
        • shared electrons
        • strong
        • brittle
      • ionic
        • brittle
        • non-metal + metal
        • brittle
      • metallic
        • metals
        • delocalised electrons
        • malleable

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