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5 Written Questions

5 Matching Questions

  1. The symbol ^19F indicates a fluorine atom that contains
  2. as the atomic masses of the elements in the periodic table increase, th number of atoms in a mole of each element
  3. The mass number of an atom is defined as its
  4. Isotopes of an element contain different numbers of
  5. The nucleus of an atom has all of the following characteristics except that it
  1. a remains the same
  2. b 9 protons and 10 neutrons
  3. c neutrons
  4. d contains nearly all of the atom's volume
  5. e total number of protons and neutrons

5 Multiple Choice Questions

  1. Thomson
  2. The number of protons in an atom is its atomic number
  3. amu
  4. An atom contains a small, dense, positively charged central region
  5. Avogadro's number

5 True/False Questions

  1. As the atomic number increases, the number of electrons in an atomincreases


  2. Who expl;ained the behavior of positively charged particles being delected from a metal foil as the nucleus?passed through the foil


  3. The atomic number of an atom is defined as itstotal number of protons and neutrons


  4. the composition of the two oxides of lead, PbO and PbO2, are explained by thelaw of multiple proportions.


  5. According to Dalton's atomic theory, atomsof each element are identical in size, mass, and other properties


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