Peete Burkholder Science

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