periodic table vocab

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Across
  1. 2. number 18 on the periodic table
  2. 4. number protons are equal to...
  3. 6. electrons the amount of electrons on the outer ring
  4. 9. element with same number of protons but different number of neutrons
  5. 11. structure composition of an atom
  6. 12. number 67 on the periodic table
  7. 13. symbol W
  8. 15. Number 16 on periodic table
  9. 16. symbol Pb
  10. 17. symbol Ag
  11. 18. number 49 on the periodic table
Down
  1. 1. number 33 on the periodic table
  2. 3. number 48 on the periodic table
  3. 4. mass protons plus neutrons
  4. 5. usually in a staircase formation on the periodic table
  5. 7. the smallest unit of a chemical element that has the properties of that element
  6. 8. number five on the periodic table
  7. 10. number 27 on the periodic table
  8. 13. symbol Tl
  9. 14. gases Group with 8 valance electrons