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