Periodic Table

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Across
  1. 5. noble gas with 2 valence electrons
  2. 7. metalloid in group 16
  3. 9. negative ions are called _____
  4. 11. neutral atom contains 51 electrons
  5. 13. halogen with mass closest to 120
  6. 14. this element is required for strong bones and teeth
  7. 15. nonmetal in period 6
  8. 18. all atoms will gain or lose electrons to form an __
  9. 19. this ion has a -1 charge, mass number 81, and 46 neutrons
  10. 21. columns on periodic table
  11. 22. sulfur is most likely to ____ 2 electrons
  12. 24. chlorine is a member of the _______ group / family
  13. 25. horizontal lines on periodic table
  14. 27. atomic number 38
Down
  1. 1. positive ions are called ______
  2. 2. this transition metal in period 6 is a liquid at room temperature
  3. 3. in group 13 and period 3
  4. 4. element in period 4 with 1 valence electron
  5. 6. ______ metals are in group 1
  6. 8. number of valence electrons in a transition metal
  7. 10. name of the group of elements that are stable and are not likely to gain or lose electrons
  8. 12. gallium is most likely to ____ 3 electrons
  9. 16. metalloid most likely to form a positive ion
  10. 17. element in group 1 that is not a metal
  11. 20. element likely to have a -3 charge
  12. 23. this element is used to make jewelry, it is symbol Au
  13. 26. contains 7 protons