Periodic Table

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Across
  1. 3. bromine is in what group?
  2. 10. nonmetals become ___ ions
  3. 12. hydrogen is what type of element?
  4. 13. metals and nonmetals ___ bond together to form a ion
  5. 16. The first periodic table was arranged by increasing ___
  6. 19. the number of valence electrons in oxygen
  7. 20. shiny and dense are both properties of
  8. 21. lanthanides are also known as
  9. 23. noble gases have characteristic ___ when excited
  10. 24. plutonium is in what group?
  11. 27. The amount of elements in the first periodic table
  12. 29. lithium is in what group?
  13. 30. calcium is in what group?
  14. 31. all actinides are ___
Down
  1. 1. metals become ___ positive ions
  2. 2. ___ electrons are the outermost electrons
  3. 4. helium is in what group?
  4. 5. which semi-metal has a atomic number of 5
  5. 6. property of nonmetal (not sharp but)
  6. 7. The person credited with the creation of the periodic table
  7. 8. alkali metals are what color/shade
  8. 9. shape can be easy or hard to change
  9. 11. nickel is in what group?
  10. 14. halogens are the ___ reactive nonmetal
  11. 15. Lanthanides react ___ with most nonmetals
  12. 17. which metal has a atomic mass of 50.942
  13. 18. a positive ion is called a
  14. 22. only group to contain solids, liquids, and metals
  15. 25. alkalize metals do what in air?
  16. 26. transition metals are ___ in wire or sheet form
  17. 28. promethium is in what group?