Across
- 1. horizontal row on periodic table
- 5. a neutral particle
- 8. bad heat/electricity conductor
- 9. a particle with a positive charge
- 11. what hold atoms together in molecules
- 12. electron pair between two atoms
- 13. good heat/electricity conductor
- 15. group of atoms bonded together
- 16. particle with a negative charge
Down
- 2. one or more positive/negative charge
- 3. union of separate elements
- 4. atoms together in metallic substance
- 6. column in periodic table
- 7. basic unit of a chemical element
- 10. electron in the outer shell of an atom
- 14. is neutral: contains cations/anions