Across
- 3. of chemical reaction where a substance loses electrons → Oxidation (9 letters)
- 4. with a pH lower than 7 → Acid (4 letters)
- 6. that speeds up a chemical reaction without being consumed → Catalyst (8 letters)
Down
- 1. that is liquid at room temperature → Mercury (7 letters)
- 2. element with the symbol "O" → Oxygen (6 letters)
- 4. particle with a negative charge → Electron (8 letters)
- 5. gas with the symbol "He" → Helium (6 letters)