The Atom

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Across
  1. 3. this is a row on the periodic table
  2. 5. this is a charged atom
  3. 6. opposite charges ______ each other
  4. 7. the smallest unit of an element that still retains its properties
  5. 8. the sum of the protons and neutrons in an atom
  6. 9. a region of negative charge in which there is a high probability of finding an electron
  7. 11. this can also be referred to as a family and are the columns of the periodic table
  8. 13. atoms of the same element with different masses
  9. 14. the subatomic particle with almost no mass
Down
  1. 1. the weighted average of all the different isotopes of an element
  2. 2. this is a positive subatomic particle
  3. 4. the periodic table is arranged by this number
  4. 10. this is a neutral subatomic particle
  5. 12. like charges _______ each other