Periodic Table Vocab Crossword Puzzle

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Across
  1. 2. a tooled used to organize all known elements
  2. 4. electrons in the outermost shell
  3. 8. two or more different elements or compound combined, not chemically bonded
  4. 9. a mixture where you cannot see the individual parts
  5. 11. an element with a different number of neutrons than normal
  6. 15. smallest unit of matter, makes up everything
  7. 17. neutral subatomic particle, in the nucleus
  8. 18. the place you are most likely to find electrons
  9. 19. the number of protons in an element
  10. 20. the abbreviate (nickname) of an element, one or two letters
  11. 21. a word to describe an isotope that is radioactive and will decay (breakdown)
  12. 22. a mixture where you can see the individual parts
Down
  1. 1. negatively charged ion, more electrons than protons
  2. 3. average weight of an element, the number of protons and neutrons in an element
  3. 5. two different elements chemically combined, pure substance
  4. 6. the full name of an element
  5. 7. positive subatomic particle, in the nucleus
  6. 10. positively charged ion, more protons than electrons
  7. 12. a pure substance, one kind of atom
  8. 13. a word to describe an isotope that is not radioactive and will not decay (breakdown)
  9. 14. negative subatomic particle, in orbital around the nucleus
  10. 16. charged atom (positive or negative charge), unequal number of protons and electrons