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5 Written Questions

5 Matching Questions

  1. Isotopes are atoms of the same element that have different
  2. Who expl;ained the behavior of positively charged particles being delected from a metal foil as the nucleus?
  3. the composition of the two oxides of lead, PbO and PbO2, are explained by the
  4. As the atomic number increases, the number of electrons in an atom
  5. The mass of a neutron is
  1. a increases
  2. b masses
  3. c about the same as that of a proton
  4. d law of multiple proportions.
  5. e Ernest Rutherford

5 Multiple Choice Questions

  1. total number of protons and neutrons
  2. electron
  3. 30
  4. of each element are identical in size, mass, and other properties
  5. contains nearly all of the atom's volume

5 True/False Questions

  1. The nucleus of most atoms is composed oftightly packed protons and neutrons


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


  3. Which of the following is NOT part of Dalton's Theory? In cheimcal reactions, aroms are combined, seperated, or rearranged.
    All matter is composed of extremely small particles called attoms
    Atoms cannot be divided, created or destroyed
    The number of protons in an atom is its atomic number
    of each element are identical in size, mass, and other properties


  4. What did Rutherford conclude about the structure of the atomAn atom contains a small, dense, positively charged central region


  5. Which part of an atom has a mass approximately equal to 1/2000 of the mass of a common hydrogen atom?contains nearly all of the atom's volume


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