Periodic Table

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12345678910111213141516171819
Across
  1. 3. basic unit of matter
  2. 4. total mass of an atom
  3. 5. model of an atom or elements
  4. 7. a table made up of every element
  5. 9. creator of the current periodic table
  6. 12. model showing the number of electrons with dots
  7. 15. how many protons an element has
  8. 16. no charge, inside the nucleus
  9. 18. an ion with more neutrons than protrons
Down
  1. 1. 2 or more chemically combined elements
  2. 2. pure substance that can't be broken down
  3. 4. most reactive family
  4. 6. electrons on the outer shell
  5. 8. negative charge, outside the nucleus
  6. 10. an ion with more protons than electrons
  7. 11. 2 or more compounds physically combined
  8. 13. a charged element
  9. 14. non-reactive, reacts with no other family
  10. 17. positive charge, inside the nucleus
  11. 19. most reactive non-metal family