Quiz

• What is an atom?

  The smallest part of an element that can exist
• What is an element?

  A substance made of only one type of atom
• What is a compound?

  Two or more different elements chemically combined together
• What is a mixture?

  Two or more elements or compounds not chemically combined together
• What is the relative mass and relative charge of a proton?

  Mass = 1

  Charge = +1
• What is the relative mass and relative charge of a neutron?

  Mass = 1

  Charge = 0
• What is the relative mass and relative charge of an electron?

  Mass = very small

  Charge = -1
• What did the plum pudding model suggest about atoms?

  Atoms are a sphere of positive charge with negatively charged electrons placed In it
• What was the conclusion of the gold foil experiment?

  Most of the atom is empty space with all the positive charge concentrated at the centre in a nucleus
• Who discovered the neutron?

  James Chadwick