Across
- 5. Makes up 78% of the air we breathe
- 7. the substance in which the solute dissolves
- 8. Tiny particles that all matter is made of
- 9. Negatively charged subatomic particles
- 11. A chemical substance that is present at the start of a chemical reaction.
Down
- 1. The study of what substances are made of
- 2. A mixture when one substance dissolves another
- 3. Building blocks of protein
- 4. Mixture of metals
- 6. The Centre of an atom
- 10. The first column on the periodic table