Across
- 5. properties of non metals and metals
- 7. metals in group 1
- 9. negative charge
- 10. Rows
- 14. electrons on the last energy level
- 16. average mass of atoms
- 17. no charge
- 20. an atom, negative or positive
Down
- 1. Columns
- 2. measurement of matter
- 3. elements that are solid and room temperature
- 4. positive charge
- 6. metals in group 2
- 8. Table of Elements- a table of all known elements
- 11. mass per unit of volume
- 12. A pure substance
- 13. positive charge
- 15. metallic and reflects light
- 18. negative charge
- 19. smallest unit of an element