Across
- 3. Metals that are less reactive and silvery white
- 4. Protons + Neutrons
- 5. A metal in Group 2
- 9. Gases that are nonmetal and nonreactive
- 12. A term that describes the size of the atom
- 13. A character of metals
- 14. A metal in Group 1
- 16. A nonmetal in Group 18
- 17. Phosphorus is in this group
- 18. The tendency of an atom to pull electrons close to itself
- 20. Silicon is in this group
- 21. Highly reactive nonmetals
- 22. Element number 80
Down
- 1. Boron is an example of a...
- 2. The number of protons
- 6. A nonmetal in Group 17
- 7. Aluminum is in this group
- 8. The energy required to remove an electron
- 10. Metals that hard soft, shiny, and highly reactive
- 11. Sulfur is in this group
- 13. Element number 20
- 15. This subatomic particle has a negative charge
- 19. A type of electrons, found in the outermost shell