Periodic Table
Across
- 2. rows
- 4. reactive metals, but less reactive than alkali
- 7. unreactive nonmetals
- 8. very reactive metals on far left of the periodic table
- 9. poor conductors of heat and electricity
- 11. chemical & physical properties of elements repeat when they are arranged by atomic number
- 14. elements in the same group have the same # of these
- 19. metals in the middle of the periodic table
Down
- 1. principle that states that atoms want 8 valence electrons
- 3. radium of an ion
- 5. radius of an atom
- 6. ability of atoms to attract electrons
- 10. good conductors of heat and electricity
- 12. extremely reactive nonmetals
- 13. energy required to remove an electron
- 15. the four blocks on the periodic table
- 16. have physical properties of both metals & nonmetals
- 17. atom or group of atoms that has a positive or negative charge
- 18. columns (families)