Chemistry Crossword

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Across
  1. 5. Positively charged particle in the nucleus of an atom.
  2. 9. Came from the Greek word,"khemia" meaning juice of a plant.
  3. 10. Measure of atomic mass; (amu).
  4. 12. The speed of a chemical reaction.
  5. 15. Substance(s) created by a reaction.
  6. 17. Group 15, period 7.
  7. 21. A slow chemical reaction in which the metal is decomposed when it reacts with oxygen.
  8. 22. The smallest part of an element that is representative of that element.
  9. 24. Invisible negatively charged particle that orbits the nucleus of an atom.
Down
  1. 1. The number that represents the amount of atoms in a chemical formula.
  2. 2. Vertical column of elements in the table.
  3. 3. Produced when two non-metals are combined.
  4. 4. A chemical change, which releases heat energy
  5. 6. Can be in-between metals and non-metals.
  6. 7. Positive charges.
  7. 8. Most reactive non-metals.
  8. 11. Produced when a metal and non-metal are combined.
  9. 13. Substances that start a reaction.
  10. 14. An organic catalyst.
  11. 16. Horizontal row of elements in the periodic table.
  12. 18. The positive charged centre of an atom.
  13. 19. Group 9, period 6.
  14. 20. Anything that has mass and occupies space.
  15. 21. An enzyme found in plant and animal cells.
  16. 23. Neutral particle in the nucleus of an atom.