Across
- 5. The fundamental building blocks of all matter
- 6. These particles have no electric charge and are found in the nucleus
- 10. The cluster of protons and neutrons at the centre of an atom
- 11. A cluster of the atoms that makes up an element or a compound
- 13. A substance that releases hydroxide ions (OH-)
- 15. A subatomic particle is positively charged
- 16. The representation of the number of electrons in each shell of an atom
- 19. Atoms which have lost or gained electrons to become charged
- 21. The attraction between charged ions form this
- 22. The number that represents the number of protons and neutrons
- 23. A substance that is made of only one type of atom
- 24. These particles have a negative charge and surround the nucleus
Down
- 1. A grid-like structure of atoms where particles are bonded together
- 2. Atoms that have the same number of protons but different number of neutrons
- 3. Is a common indicator that distinguishes between acids and bases by either changing red or blue
- 4. When a cation and anion form a bond with each other
- 7. A substance that releases hydrogen ions (H+) into an aqueous solution
- 8. The number of protons is represented by this
- 9. A pure substance that is made up of two or more different types of atoms
- 12. Atoms which have lost electrons and become positively charged
- 14. Cloud layers that surround the nucleus that hold only a certain number of electrons
- 17. Atoms which have gained electrons and become negatively charged
- 18. When two or more substances are simply mixed together
- 20. A base that can dissolve in water