Chemistry Crossword

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Across
  1. 3. Combination of two or more atoms help together by covalent bonds.
  2. 9. Suspension of small, solid particles formed during a chemical reaction.
  3. 12. Subatomic particle that is neutral.
  4. 14. Ability to be beaten or rolled into sheets without crumbling.
  5. 15. Two elements combine to form a compound.
  6. 16. Substance that has a pH of less than 7.
  7. 18. Substance that has a pH of more than 7.
  8. 20. Subatomic particle that has a negative charge.
Down
  1. 1. Cloud-like energy level that surrounds the nucleus of an atom; occupied by one or more electrons.
  2. 2. Coloured non-metals that are very reactive.
  3. 4. Pure substance made from two or more elements that are combined together chemically.
  4. 5. Central core in an atom composed of protons and neutrons.
  5. 6. Combination or pure substances.
  6. 7. Chemical reaction between an acid and a base that produces water and a salt.
  7. 8. Subatomic particle that has a positive charge.
  8. 10. Chemical reaction in which a compound or element rapidly combines with oxygen gas.
  9. 11. Substance that has a pH of 7.
  10. 13. Anything that has mass and takes up space.
  11. 17. An atom or a group of atoms that has a positive or negative charge.
  12. 19. Substance that cannot be broken down into any simpler substance by chemical means.