APT Crossword Puzzle Review

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Across
  1. 2. Poor conductors of heat and electricity; often dull and brittle
  2. 3. Located on the left side of the periodic table
  3. 5. The number of protons, always the same number for the same element
  4. 6. The small, dense center of an atom that has a positive charge
  5. 9. The electrons in the outermost energy level that are involved with bonding
  6. 11. Smallest particle into which an element can be divided and maintain its properties
  7. 12. The number of protons and neutrons
  8. 14. A charged particle
  9. 15. The subatomic particles of an atom with no charge
  10. 17. The rows of the periodic table
  11. 19. The bond that would occur between Potassium and Oxygen
Down
  1. 1. Mendeleev’s arrangement of the elements
  2. 4. The energy levels around the nucleus that the electrons move around in
  3. 7. The negatively charged subatomic particles of the atom
  4. 8. The bond that would occur between Chlorine and Fluorine
  5. 10. Has properties of both metals and nonmetals
  6. 13. The bond that would occur between Magnesium and Manganese
  7. 16. The positively charged subatomic particles of an atom
  8. 18. The columns of the periodic table