Atoms, Ions and Acids and Bases

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