Christopher's Periotic table crossword

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Across
  1. 2. Amount of matter in an object
  2. 3. The Smallest atom
  3. 6. Two or more Elements or Compounds not CHEMICALLY combined
  4. 9. Neon, Sulfur, Iodine, Krypton
  5. 11. A semiconductor
  6. 12. The study of matter and how it changes
  7. 14. Neutrons plus Protons equal
  8. 16. A horizontal row
  9. 18. Can be drawn into long wires
  10. 19. name for family
Down
  1. 1. Mendeleev- Made the periodic table
  2. 4. Conductivity- Ability to transfer heat
  3. 5. Measure of the force of gravity
  4. 7. pure substance containing one kind of atom
  5. 8. Molecule- Made up of two atoms
  6. 10. and malleable
  7. 12. A pure substance containing two or more kinds of Elements
  8. 13. When elements react to another substance
  9. 15. amount of space that matter occupies
  10. 17. Means salt forming