Matter book crosswords

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Across
  1. 2. shows the type and number of atoms in a molecule
  2. 4. when particles of different substances rearrange creating new substances
  3. 11. smallest particle of matter
  4. 13. one or two letters used to represent an element.
  5. 15. substances composed of many different particles
  6. 16. copy and pasting DNA from one organism to another
  7. 17. characteristic of substances that describe how likely they are to engage in chemical reactions with other substances
  8. 19. substances present before chemical reaction
  9. 20. amount of matter in an object
  10. 21. physical property where molecules of substances do not spread out to create a mixture with other substances
  11. 22. physical property where molecules of substances spread out to create a mixture with another substance
  12. 23. amount of space an object occupies
  13. 24. substances present after chemical reaction
  14. 25. mathematical relationship between the amount of mass and how much volume it is in
Down
  1. 1. particle made of many atoms bonded together
  2. 3. number of protons in an atom and is used to identify each element
  3. 5. chemical reaction in plants turning water, sunlight and CO2 into oxygen and sugar
  4. 6. organized chart showing repeating patterns on known elements
  5. 7. characteristic of substance that can be measured or observed with senses
  6. 8. atoms are not created or destroyed in chemical reactions
  7. 9. substance composed of all the same atom
  8. 10. any pure substance that we know the composition of the particles
  9. 12. anything that has mass and takes up space
  10. 14. chemical property of substances that react rapidly with oxygen producing a flame
  11. 17. substance composed of all the same molecule
  12. 18. substances composed of only one particle