Across
- 2. A substance that accepts hydrogen ions or produces hydroxide ions (OH⁻) in water.
- 5. Atoms of the same element with different numbers of neutrons.
- 7. Number The total number of protons and neutrons in an atom.
- 9. A particle with no charge found in the nucleus of an atom.
- 10. A measure of how acidic or alkaline a solution is.
- 14. The amount of solute dissolved in a given volume of solution.
- 16. Ion (OH⁻) The ion responsible for alkaline properties.
- 18. A reaction between an acid and a base that produces salt and water.
- 19. A substance that changes colour to show the pH of a solution.
Down
- 1. The dense central region of an atom containing protons and neutrons.
- 3. A soluble base that produces hydroxide ions in solution.
- 4. A negatively charged particle that moves around the nucleus.
- 6. A pure substance made of only one type of atom.
- 8. The smallest particle of an element that retains its properties.
- 10. A positively charged particle found in the nucleus of an atom.
- 11. A substance that releases hydrogen ions (H⁺) in water.
- 12. An ionic compound formed during a neutralisation reaction.
- 13. Number The number of protons in an atom's nucleus.
- 15. Ion (H⁺) The ion responsible for acidic properties.
- 17. An atom or group of atoms that has gained or lost electrons and carries a charge.