Across
- 1. First group.
- 2. Part of period 6, under the periodic table.
- 4. How elements compare with other elements in there group.
- 5. Electrons in the outer energy level.
- 7. Dmitri Mendeleev placed elements in order by increasing ____________
- 8. Group 17.
- 9. Where electrons are found.
- 11. Last group.
- 13. Groups 3 through 12.
- 16. How two or more elements react together.
- 17. Row.
- 18. Column.
- 19. What the periodic table is made of.
Down
- 1. Second group.
- 3. Good conductor of heat and electicity.
- 6. Group 16.
- 10. Has properties of both metals and nonmetals.
- 12. Equals protons.
- 14. Gas or brittle solid and is not a good conductor of heat and electricity.
- 15. Under the lanthanides and all of them are radioactive.