Mary Ann

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Across
  1. 3. the electrons on an atom's outer orbital
  2. 6. has an atomic number of 1
  3. 8. the smallest particle of an element that retains the element's properties
  4. 11. has an atomic symbol of O
  5. 15. atomic number
  6. 16. group 17
  7. 17. number of how many protons + neutrons are in the nucleolus of an atom
  8. 18. how many protons and neutrons there are
  9. 19. has an atomic number of 27
  10. 20. starts below boron
Down
  1. 1. the group that helium is in
  2. 2. the rows on the Periodic table
  3. 4. the columns on the Periodic table
  4. 5. has properties of being shiny, mand a good conductor
  5. 7. has atomic symbol of Na
  6. 9. has atomic symbol of Mg
  7. 10. represented as "C"
  8. 12. has the properties of being dull, and brittle
  9. 13. Atoms with the same element that have different numbers of...
  10. 14. the group that iron is in