4th Sep '25

4C Keywords

4C35
  1. Chemical reaction (11) - 4C:11
    • A process in which one or more substances, the reactants, are converted to one or more different substances, the products.
  2. Acid (4) - 4C:4
  3. Alkali (4) - 4C:4
  4. Indicator (3) - 4C:3
  5. Base (3) - 4C:3
  6. Combustion (3) - 4C:3
    • A chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light.
  7. Oxidation (3) - 4C:3
    • The addition of oxygen to a compound.
  8. Heat (2) - 4C:2
  9. pH (2) - 4C:2
  10. pH Scale (2) - 4C:2
  11. Atom (2) - 4C:2
    • The smallest particle of an element that can exist either alone or in combination.
  12. Symbol Equation (2) - 4C:2
    • The symbolic representation of a chemical reaction, wherein the reactant(s) are given on the left-hand side and the product(s) on the right-hand side.
  13. Word Equation (2) - 4C:2
    • is a chemical reaction expressed in words rather than chemical formulas. A word equation should state the reactants (starting materials), products (ending materials), and direction of the reaction in a form that could be used to write a chemical equation.
  14. Catalyst (1) - 4C:1
  15. Displacement (1) - 4C:1
  16. Reactive (1) - 4C:1
  17. Endothermic (1) - 4C:1
  18. Chemical (1) - 4C:1
  19. Neutralisation (1) - 4C:1
  20. Exothermic (1) - 4C:1
  21. Metal (1) - 4C:1
  22. Tarnish (1) - 4C:1
  23. Conservation of mass (1) - 4C:1
  24. Precipitate (1) - 4C:1
  25. Chemical formulae (1) - 4C:1
    • A formula that gives the total number of atoms of each element in each molecule of a substance
  26. Fuel (1) - 4C:1
    • Any substance which is a source of chemical energy.
  27. Thermal (1) - 4C:1
    • Heat
  28. Thermal decomposition (1) - 4C:1
    • Large molecules breaking down into smaller molecules when heated.
  29. Decomposition (1) - 4C:1
    • Large molecules splitting into smaller molecules
  30. Molecule (1) - 4C:1
    • More than one atom bonded together
  31. Gas (1) - 4C:1
    • Particles are spread apart and move about randomly. So they have high amounts of kinetic energy but attraction between particles is weak.
  32. Burning (1) - 4C:1
    • Producing or having a flame.
  33. Product (1) - 4C:1
    • The materials formed in a chemical reaction.
  34. Rusting (1) - 4C:1
    • The reaction of iron and oxygen in the presence of water or air moisture to produce iron oxide.
  35. Reactant (1) - 4C:1
    • The starting materials in a chemical reaction.
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