P1

• how do metals conduct electricity (3 marks)

  • Metals have free delocalised electrons
  • which can carry the electrical charge
  • as the electrons are free to move the charge through the metal
• how do you know that the graph shows the reaction is exothermic

  • level of products is below line of level of reactants
• describe the structure and bonding of diamond

  • covalent bonds
  • 1 carbon bonded to 4 others
  • forms a giant macromolecular structure
• give one observation the student could make to show that the ... is in excess

  the solid no longer disapears
• why is mesh used to seperate the products of electrolysis

  • so they don't rereact to form the reactant