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5 Written questions

5 Matching questions

  1. Scanning Tunneling Microscopes(STM)
  2. Proton
  3. Mass number
  4. Strong Nuclear Force
  5. Relative Atomic Mass
  1. a a subatomic particle that has a positive charge and that is found in the nucleus of an atom
  2. b Uses a needle-like probe to measure differences in voltage caused by electrons that leak, or tunnel, from the surface of the object being viewed
  3. c the sum of the numbers of protons and neutrons in the nucleus of an atom
  4. d a mass of an atom expressed in relation to the defined standard of 12 amu (1 carbon atom)
  5. e a powerful force of attraction that binds protons and neutrons together in the nuleus

5 Multiple choice questions

  1. the weighted average of the atomic masses of the naturally occurring isotopes of an element
  2. the amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12
  3. confirmed the existence of the neutron
  4. if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers
  5. atoms are balls of positively charged material with negative electrons scattered throught

5 True/False questions

  1. Law of Definite Proportionsif two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers

          

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

          

  3. Avogadro's numberThe number of protons in the nucleus of an atom.

          

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

          

  5. Molar massthe amount of a substance that contains as many particles as there are atoms in exactly 12 g of carbon-12

          

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