NAME: ________________________

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5 Written Questions

5 Matching Questions

  1. The atomic number of an atom is defined as its
  2. The mass of a neutron is
  3. The average atomic mass of an element depends on both the masses of its isotopes and each isotope's
  4. According to Dalton's atomic theory, atoms
  5. In a cathode tube, electrical current passes from on electrode, the ____, to the opositely charged electrode
  1. a cathode
  2. b of each element are identical in size, mass, and other properties
  3. c number of protons
  4. d about the same as that of a proton
  5. e relative abundance

5 Multiple Choice Questions

  1. neutrons
  2. 27
  3. all atoms contain electrons
  4. electron cloud
  5. nucleus

5 True/False Questions

  1. The number of atoms in a mole of any pure substance is calledAvogadro's number


  2. Who first propsed an atomic theory based on scientific knoledgeJohn Dalton


  3. an atom is electricaly neutral becauseabout the same as that of a proton


  4. An atom's density is based upon itsabout the same as that of a proton


  5. The abbreviation for atomic mass unit isamu


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