Atoms (page 232)

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Across
  1. 4. shell electrons are called_______________ electrons
  2. 5. Abbreviation for Atomic Mass Units.
  3. 7. This scientist created the atomic theory
  4. 8. Atoms are arranged on The Periodic Table of the _____________.
  5. 9. To find the number of __________: Subtract the atomic number from the atomic mass
  6. 10. The positively charged particle of an atom.
  7. 11. A _______________ is a vertical column on The Periodic Table of the Elements
Down
  1. 1. number, the number of protons and electrons when the atom is balanced; found above the element symbol
  2. 2. Used a gold foil experiment to help understand the structure of the atom.
  3. 3. Type of bonding where atoms share electrons
  4. 6. negatively charged particles