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5 Written questions

5 Matching questions

  1. Proton
  2. Atom
  3. J J Thompson
  4. Plum Pudding Model of the atom
  5. Atomic Number
  1. a 1897- Idea of a subatomic negatively charged particle (electron). Made Plum Pudding model of the atom.
  2. b a subatomic particle that has a positive charge and that is found in the nucleus of an atom
  3. c atoms are balls of positively charged material with negative electrons scattered throught
  4. d the smallest particle of an element that retains its identity in a chemical reaction
  5. e The number of protons in the nucleus of an atom.

5 Multiple choice questions

  1. the mass in grams of 1 mol of a substance
  2. the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12
  3. negatively charged particles found outside the nucleus
  4. Conducted by Ernest Rutherford in which alpha particles that were shot at gold foil were deflected when they hit the positive center of gold atoms. The nucleus was discovered as a result of this experiment.
  5. confirmed the existence of the neutron

5 True/False questions

  1. Scanning Tunneling Microscopes(STM)a powerful force of attraction that binds protons and neutrons together in the nuleus

          

  2. Law of Multiple Proportionsthe fact that a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound

          

  3. Relative Atomic Massa mass of an atom expressed in relation to the defined standard of 12 amu (1 carbon atom)

          

  4. Isotopeatom of an element that has a number of neutrons different from that of other atoms of the same element

          

  5. Average Atomic Massa mass of an atom expressed in relation to the defined standard of 12 amu (1 carbon atom)

          

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