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5 Written questions

5 Matching questions

  1. The nucleus of most atoms is composed of
  2. as the atomic masses of the elements in the periodic table increase, th number of atoms in a mole of each element
  3. In a cathode tube, electrical current passes from on electrode, the ____, to the opositely charged electrode
  4. Who expl;ained the behavior of positively charged particles being delected from a metal foil as the nucleus?
  5. an atom is electricaly neutral because
  1. a Ernest Rutherford
  2. b tightly packed protons and neutrons
  3. c cathode
  4. d the number of protons and electrons are equal
  5. e remains the same

5 Multiple choice questions

  1. 27
  2. all atoms contain electrons
  3. Thomson
  4. number of protons
  5. passed through the foil

5 True/False questions

  1. The nucleus of an atom has all of the following characteristics except that itcontains nearly all of the atom's volume


  2. The average atomic mass of an element depends on both the masses of its isotopes and each isotope'snumber of protons


  3. The mass number of an atom is defined as itsnumber of protons


  4. The abbreviation for atomic mass unit isabout the same as that of a proton


  5. Which part of an atom has a mass approximately equal to 1/2000 of the mass of a common hydrogen atom?nucleus