Across
- 4. Inner-transition metals
- 5. group 1; very reactive
- 6. Vertical column in the periodic table
- 8. poor conductors of heat/electricity
- 10. Good conductors of heat/electricity
- 11. They don't react with other elements
Down
- 1. second most reactive; forms basic solutions
- 2. non-metals that easily combine with other elements
- 3. difficult to explain
- 7. all are radioactive
- 9. Mix of both metals and non-metals