Periodic Table

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Across
  1. 3. a nonmetallic element that has some properties of metal
  2. 6. bivalent metals of the periodic table
  3. 8. particle with 0 charge
  4. 12. tiny central core of an atom
  5. 14. organizes information about elements
  6. 16. longer than a epoch and shorter than an era
  7. 18. concoction of several parts combined
  8. 22. a fundamental constant
  9. 23. quality of recurring at regular intervals
  10. 27. an electron in the outer shell of an atom
  11. 28. number of neutrons in a atomic nucleus
  12. 30. group of soft metallic elements
  13. 31. stable particle with positive charge
  14. 32. gaseous elements of helium
Down
  1. 1. unit of measurement
  2. 2. number of protons in a atom
  3. 4. physical theory that certain properties occur
  4. 5. basic unit of an element
  5. 7. chemical elements that are shiny solids
  6. 9. various chemical elements to have valance electrons
  7. 10. combination or mixture of two or more things
  8. 11. number of entities
  9. 13. electrons circulating around a molecule
  10. 15. particular type of energy
  11. 17. unbalanced electricity in a body
  12. 19. atom with different number of neutrons
  13. 20. chemical element that forms salt
  14. 21. an element that aren't shiny soilds
  15. 22. something basic and important
  16. 24. particle with a positive or negative charge
  17. 25. particle with a negative charge
  18. 26. not susceptible to process of decay
  19. 29. definite stable energy