11 - Y11 term 1 v2021-03-25

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Across
  1. 2. A measure of the degree of hotness on a fixed scale.
  2. 4. How quickly a chemical is used up or produced.
  3. 5. A chemical equation that shows how positively charged ions join with negatively charged ions to make a compound.
  4. 6. A substance that reacts together with another substance to form products during a chemical reaction.
  5. 7. The sequence of reactions needed to produce a desired product from a particular set of raw materials.
  6. 9. A chemical equation written using the symbols and formulae of the reactants and products, so that the number of units of each element present is the same on both sides of the arrow.
  7. 10. In chemistry, a substance is in excess if there is more than enough of it to react with another reactant.
Down
  1. 1. A symbol used in chemical equations to show if a substance is a solid, a liquid, a gas, or an aqueous solution.
  2. 3. The average mass of all isotopes of an element
  3. 8. A substance that changes the rate of a chemical reaction without being changed by the reaction itself.