Across
- 4. A vertical column in the periodic table.
- 8. A neutral solution has a pH of _______.
- 10. A reaction that releases energy to the surroundings.
- 13. A positively charged subatomic particle.
- 14. Method used to separate substances based on their solubility.
- 18. Method used to separate two liquids based on their boiling points.
- 19. The reaction between an acid and a base.
Down
- 1. Two or more substances not chemically bonded.
- 2. Group 7 elements are called ________.
- 3. The centre of an atom.
- 5. This is used to test pH by colour change.
- 6. What is transferred during chemical reactions?
- 7. Method used to separate an insoluble solid from a liquid.
- 9. A substance made up of two or more elements chemically bonded together.
- 11. A horizontal row in the periodic table.
- 12. Reaction involving oxygen that releases energy.
- 15. A reaction that takes in energy from the surroundings.
- 16. Substances with a pH less than 7.
- 17. A substance made up of only one type of atom.
- 19. Group 0 elements are known as ______ gases.