Across
- 3. – A small number that shows how many atoms are in a molecule.
- 4. Equation – A chemical equation with the same number of atoms on both sides.
- 6. – A solid that forms and sinks during a chemical reaction.
- 7. Formula – A shorthand way to show what elements and how many atoms are in a substance.
- 9. – When two substances combine to make one new product.
- 11. – The substances made after a reaction happens.
- 12. Replacement – One element switches places with another in a compound.
Down
- 1. – A reaction that needs oxygen and usually produces fire.
- 2. – The starting materials in a chemical reaction.
- 5. – A big number in front of a chemical formula that tells how many.
- 8. – When one substance breaks apart into simpler pieces.
- 10. Replacement – Two compounds swap partners.