Across
- 2. atoms of the same type that are grouped together
- 4. periodic table
- 5. anything that has mass and takes up space
- 8. group of atoms bonded together
- 9. a substance that contains two or more atoms that are chemically combined
Down
- 1. components are not chemically bonded together
- 2. particle with a charge of negative electricity
- 3. H2O
- 6. building blocks
- 7. NaCl