chemistry paper 1

• 2 things fullerenes are used for:

  As catalysts

  To deliver drugs into body
• what are alloys?

  Mixtures of two or more metals.
• Properties of gold

  Good conductor

  Ductile

  Shiny
• Properties of copper

  Ductile

  Good conductor

  Malleable
• Properties of aluminium

  Malleable

  Low density

  Good conductor
• Special properties of graphene

  Strong

  Good thermal and electrical conductor High melting point
• Properties of diamond

  Giant rigid covalent structure

  Doesnt conduct electricity

  High melting point
• Thomsons theory on atoms


  Plum pudding model
• Chadwick atom contribution


  Provided evidence of neutrons in the nucleus
• Niels bohr atom contribution

  Electrons orbit nucleus at a specific distance
• Rutherford’s atom contribution

  Positive charge within nucleus.
• 2 characteristics of group 1 elements

  1 electron in outer shell

  Become more reactive down group
• 2 characteristics of group 0 elements


  Noble gases

  Unreactive non metals
• 2 characteristics of group 7 elements

  7 electrons in outer shell

  Reactivity decreases down group
• What is chromography used to seperate

  Coloured components of a mixture
• What russian chemist devised the periodic table?

  Mendeleev
• What is filtration used to seperate?

  Insoluble solids from soluble solids
• What is fractional distillation used to seperate?


  Substances in a mixture with similar boiling points.
• What is crystallisation used to seperate?


  Obtaining a soluble solid from a solution
• Mr meaning

  Sum of relative atomic masses of all the atoms shown in the formula
• Law of conservation of mass


  Mass is conserved because no atoms are lost or made
• Activation energy meaning

  Minimum amount of energy needed fir a reaction to take place
• process of electrolysis

  negatively charged ions move to positive electrode which is the anode

  positively charged ions move to the negative electrode which is the cathode.
• level 12 alkaline-limewater

  level 14 alkaline- sodium hydroxide
• 2 level 7 substances


  water

  blood
• level 1 acidic sustance- hydrochloric acid

  level 3- vinegar
• properipties of graphite


  layered hexagonal structure

  layers connected by weak intermolecular forces

  high melting point