Chemistry - Year 10

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Across
  1. 1. A reaction in which two or more reactants bond together to form a single product
  2. 2. A reaction in which a substance burns in the presence of oxygen, producing heat and light
  3. 3. A reaction that consumes heat energy, and so feels cold
  4. 5. The law of conservation of mass states that _____ cannot be created or destroyed
  5. 6. A diagram in which the electron configuration is drawn
  6. 9. The outermost electron shell
  7. 10. Groups of elements on the periodic table that run horizontally; the number tells you how many electron shells the atoms have
  8. 12. The type of combustion in which the flame does not have access to enough oxygen; the flame is cool, yellow and ‘dirty’ (it produces solid carbon)
  9. 14. A reaction that produces heat
  10. 18. A reaction in which two soluble chemicals produce an insoluble solid
  11. 19. The energy of movement
  12. 21. A chemical that speeds up a chemical reaction, without using being used up in the reaction
  13. 26. The poisonous gas produced by incomplete combustion
  14. 27. The scientific word for stirring or shaking
  15. 28. A reaction in which an acid and a base neutralise each other, forming a salt and water
Down
  1. 1. The scientific word for how many atoms are found in a chemical; if we increase the number of atoms then the rate of the reaction will be increased
  2. 4. If we decrease the space between ________ , the rate of the chemical reaction will be increased
  3. 7. The chemicals found on the left-hand side of a chemical equation
  4. 8. A reaction in which a single reactant breaks down into two or more products
  5. 11. A way of summarising what happens in a chemical reaction
  6. 13. The term used to describe how many electrons an element has, and which shells they are found in
  7. 15. The region in the middle of an atom where the protons and neutrons are found
  8. 16. A reaction in which oxygen combines with a metal to form a metal oxide; rust is an example
  9. 17. The chemical reaction that happens in the cells of your body; glucose and oxygen are combined to form carbon dioxide, water and energy
  10. 20. The solid formed in a precipitation reaction
  11. 22. Groups of elements on the periodic table that run vertically; the number tells you how many electrons are found in their outermost shells
  12. 23. The chemicals found on the right-hand side of a chemical equation
  13. 24. The energy found in chemical bonds
  14. 25. The number that tells you how many electrons an element has (assuming it isn’t an ion)
  15. 26. The type of combustion in which the flame has access to plenty of oxygen; the flame is hot, blue, and produces carbon dioxide and water