Across
- 4. dull
- 6. average mass of an atom
- 8. conductive
- 9. prevents electrivity or heat
- 10. a row of the periodic table
Down
- 1. column of elements
- 2. table the chart of elements
- 3. the most reactive nonmetal elements are in group 17 of the periodic table
- 5. element that is both metal and nonmetal
- 7. breaks easily