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5 Written questions

5 Matching questions

  1. The average atomic mass of an element depends on both the masses of its isotopes and each isotope's
  2. Because any element used in the cathode produced electrons, scientist concluded that
  3. An atom is defined as the smallest part of an element that
  4. The number of atoms in a mole of any pure substance is called
  5. The atomic number of an atom is defined as its
  1. a number of protons
  2. b retains the chemicl identity of that element
  3. c relative abundance
  4. d Avogadro's number
  5. e all atoms contain electrons

5 Multiple choice questions

  1. electron
  2. neutrons
  3. cathode
  4. masses
  5. Thomson

5 True/False questions

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


  2. as the atomic masses of the elements in the periodic table increase, th number of atoms in a mole of each elementincreases


  3. The symbol ^19F indicates a fluorine atom that contains9 protons and 10 neutrons


  4. Who first propsed an atomic theory based on scientific knoledgetotal number of protons and neutrons


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