The Periodic Table Vocabulary

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Across
  1. 2. the number of protons in the nucleus of an atom
  2. 3. a column on the periodic table
  3. 5. a substance made up of atoms of two or more different elements joined by chemical bonds
  4. 7. a one or two letter representation of an element
  5. 8. a subatomic particle that has a positive charge and that is found in the nucleus of an atom
  6. 9. electron electrons on the outermost energy level of an atom
  7. 12. word part meaning having an electric charge
  8. 15. basic unit of matter - means uncuttable in Greek
  9. 16. a subatomic particle that has a negative charge
Down
  1. 1. Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements (1834-1907)
  2. 4. a chemical rule of thumb that elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas
  3. 6. word part meaning neutral
  4. 10. a horizontal row of elements in the periodic table
  5. 11. word part meaning first or positive
  6. 13. a subatomic particle that has no charge and that is found in the nucleus of an atom
  7. 14. the average mass of all the isotopes of an element