Micah Pennington's Physical Science Crossword

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Across
  1. 4. a chart in which all known elements are listed in order of atomic number
  2. 6. a count of the number of protons in the atomic nucleus
  3. 8. an electrically neutral subatomic particle in the atomic nucleus
  4. 10. a horizontal row in the periodic table
Down
  1. 1. an extremely small, negatively charged subatomic particle found in a cloud outside the atomic nucleus
  2. 2. an abbreviation for an element or atom
  3. 3. the mass of an element's atom
  4. 5. a vertical column in the periodic table; also known as a family of element
  5. 7. any material that is made up of only one type of atom
  6. 9. a positively charged subatomic particle in the atomic nucleus