Chemistry IGCSE

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Across
  1. 2. The general name for hydrocarbons with at least one carbon-carbon double bond.
  2. 4. An insoluble solid formed when two solutions are mixed in a precipitation reaction.
  3. 9. The substance in which a solute dissolves to make a solution.
  4. 12. A reaction where an acid and a base cancel each other out to form a salt and water.
  5. 13. Atoms of the same element that have the same number of protons but a different number of neutrons.
  6. 15. Series A horizontal list of metals ordered by how vigorously they react with water, dilute acids, and oxygen.
  7. 17. A compound that donates hydrogen ions (H⁺) in a water solution.
  8. 19. The chemical process by which rust forms on iron.
  9. 20. A homogeneous mixture of a solute and a solvent.
  10. 21. A chemical bond formed by the sharing of pairs of electrons between two non-metal atoms.
  11. 22. dioxide The gas that turns limewater cloudy, often produced when an acid reacts with a carbonate.
  12. 24. The fundamental building blocks of all matter, made of protons, neutrons, and electrons.
Down
  1. 1. Distillation The process of separating a mixture of liquids by boiling them based on their different boiling points.
  2. 3. The process of breaking down a molten or aqueous ionic compound using electricity.
  3. 5. The scale used to measure the acidity or alkalinity of an aqueous solution.
  4. 6. A reaction that transfers thermal energy to the surroundings, causing a temperature rise.
  5. 7. The starting substances in a chemical reaction.
  6. 8. The horizontal rows on the Periodic Table.
  7. 10. The type of bonding that involves a "sea of delocalized electrons" and positive ions.
  8. 11. The separation technique used to separate an insoluble solid from a liquid.
  9. 14. The subatomic particle that orbits the nucleus and carries a negative charge.
  10. 16. A solid that is dissolved in a solvent to form a solution.
  11. 18. An atom or group of atoms that has an electrical charge due to the loss or gain of electrons.
  12. 21. A substance that speeds up a chemical reaction without being used up itself.
  13. 23. The subatomic particle with a relative mass of 1 and no charge.