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