The Periodic Table / Elements

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Across
  1. 2. have a positive charge
  2. 6. elements that conduct electricity and heat
  3. 8. elements that have properties of both metals and nonmetals
  4. 10. the elements in groups 3 - 12
  5. 11. the short form of atomic mass unit
  6. 13. the # of protons and neutrons in the nucleus
  7. 14. never react with other elements
  8. 15. elements to the right side of the periodic table
  9. 19. the process of radioactive atoms produce energy and particles from the nuclei
  10. 22. very reactive nonmetals
  11. 24. lose one or more electrons
  12. 25. atoms produce energy and particles
Down
  1. 1. elements that are related in a column
  2. 3. have a neutral charge
  3. 4. electrons move around the nucleus
  4. 5. change in the # of neutrons
  5. 7. all are radioactive
  6. 9. the center of the atom
  7. 12. change in the # of electrons
  8. 16. the metals in group 2 and less reactive
  9. 17. gains one or more electrons
  10. 18. rare earth elements are referred
  11. 20. have a negative charge
  12. 21. metals in group 1 that are very reactive
  13. 23. from left to right, one proton and one electron added