Across
- 2. energy needed to remove an electron
- 7. contains properties of metals and nonmetals
- 8. an atom that gain electrons
- 9. ordered the periodic table by atomic mass
- 10. group eighteen
- 14. outermost electrons
- 16. elements that are shiny, able to be shaped
- 17. attraction of an atom to its electrons
- 18. a row
- 20. group two
- 21. something that can be pulled into a wire
Down
- 1. group 17
- 3. unreactive
- 4. something that can be flatten into sheets
- 5. changes in response to gaining or losing electrons
- 6. a column
- 10. elements that are dull, brittle
- 11. one half the distance of identical atoms bonded together
- 12. ordered the periodic table by atomic number
- 13. likelihood of losing electrons
- 15. an atom that loses electrons
- 19. group one