Across
- 2. S on the periodic table
- 3. C on the periodic table
- 6. Fe on the periodic table
- 7. a single type of molecules
- 9. 2 hydrogen and 1 oxygen molecule
- 10. multiple atom that make up a substance
Down
- 1. H on the periodic
- 4. the building blocks for all things
- 5. molecules mixed but with no chemical bond
- 8. chemically bonded molecules