Across
- 2. good conductors of heat and electricity
- 4. group 1 or 1a
- 7. a negatively charged subatomic particle
- 8. a horizontal row of elements
- 13. a vertical column of elements
- 14. another name for metalloid
- 15. group 17 or 7a
- 17. a neutral subatomic particle in the nucleus
- 18. another name for a group
- 19. symbol for the atomic mass unit
Down
- 1. group 2 or 2a
- 2. properties of both a metal and nonmetal
- 3. group 16 or 6a
- 5. poor conductors of heat and electricity
- 6. another name for the period
- 9. region in the atom
- 10. a positively charged subatomic particle
- 11. the center of an atom
- 12. group 18 or 8a
- 16. The smallest particle that has the properties of an element