2.01 Atoms, Elements, & Chemical Reactions

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Across
  1. 4. reaction a process in which some substances change into different substances
  2. 5. simplest form of matter that has a unique set of properties
  3. 12. substances that are produced in a chemical reaction
  4. 13. symbol a one- or two-letter designation of an element
  5. 14. a solid product that is produced in a chemical reaction
  6. 16. subatomic particle which has a negative electric charge
  7. 18. change produces different materials than the ones were started with
  8. 19. substances that start a chemical reaction
  9. 21. a substance made from two or more different elements that have been chemically joined
Down
  1. 1. state in which matter maintains a fixed volume and shape
  2. 2. subatomic particle which has a neutral in electric charge
  3. 3. state in which matter expands to occupy the volume and shape of its container
  4. 6. of consvervation of energy energy cannot be created or destroyed. Energy may change form during a chemical reaction—for example, from chemical energy to heat energy when gas burns in a furnace—but the same amount of energy remains after the reaction as before.
  5. 7. reactions that absorb energy
  6. 8. state in which matter adapts to the shape of its container but varies only slightly in volume
  7. 9. anything that has mass and volume
  8. 10. subatomic particle which has a positive electric charge.
  9. 11. state of matter that resembles a gas but has certain properties that a gas does not have
  10. 15. reactions that release energy
  11. 17. formula an expression that shows the elements in a compound and the relative proportions of those elements
  12. 20. the building blocks of matter