Across
- 3. vertical row of the periodic table
- 7. a table that represents all of the elements
- 9. building blocks
- 11. one type of element/atom
Down
- 1. the horizontal row of the periodic table
- 2. two different types of atoms chemically bonded
- 4. not chemically bonded together
- 5. atoms of the same type grouped together
- 6. a pure substance
- 8. a metal mixed with at least one other
- 10. anything that has mass or takes up space