Across
- 2. change
- 5. A column on the periodic table; another name for group
- 6. A horizontal row of elements in the periodic table
- 8. mixture
Down
- 1. A substance made up of atoms of two or more different elements joined by chemical bonds
- 3. basic unit of matter
- 4. a pure substance mad up of one atom
- 7. A column on the periodic table