Across
- 3. A substance that speeds up a chemical reaction without getting consumed
- 4. A reaction that produces heat and light, often involving combustion
- 6. gain of electrons in an atom or the gain of hydrogen and the removal of oxygen.
- 7. The process in which substances react to form new substances
Down
- 1. ffnm
- 2. The method of representing a chemical reaction with symbols and formulas
- 3. The number written before a formula in a chemical equation to balance it
- 5. The substance that is produced in a chemical reaction