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5 Written questions

5 Matching questions

  1. Average Atomic Mass
  2. Relative Atomic Mass
  3. Gold Foil experiment
  4. Quark
  5. Mass number
  1. a the sum of the numbers of protons and neutrons in the nucleus of an atom
  2. b 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.
  3. c smaller particles that make up protons and neutrons
  4. d the weighted average of the atomic masses of the naturally occurring isotopes of an element
  5. e a mass of an atom expressed in relation to the defined standard of 12 amu (1 carbon atom)

5 Multiple choice questions

  1. the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12
  2. atom of an element that has a number of neutrons different from that of other atoms of the same element
  3. a powerful force of attraction that binds protons and neutrons together in the nuleus
  4. from his gold foil expirments, he knew some substances give off + charged particles called alpha particles, most of the mass of an atom is in the nucleus, he reasoned that electrons in the atom are whirled around outside the nucleus, most of the atom is empty space
  5. a subatomic particle that has a positive charge and that is found in the nucleus of an atom

5 True/False questions

  1. Electronsa subatomic particle that has no charge and that is found in the nucleus of an atom

          

  2. Neutronnegatively charged particles found outside the nucleus

          

  3. Atomthe amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12

          

  4. Atomic NumberThe number of protons in the nucleus of an atom.

          

  5. Nuclear Model of the atomatoms are balls of positively charged material with negative electrons scattered throught

          

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