Matter and Chemistry

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Across
  1. 2. a substance that cannot be broken down into a smaller substance
  2. 5. the electrons in atoms outermost electron shell
  3. 8. an uncharged atomic particle that is a negative in the inside of a nucleus
  4. 9. a mixture that the composition is not uniform throughout the mixture
  5. 14. a particle with a positive electrical charge
  6. 15. it equals to the number of protons in the nucleus and the electrons
  7. 16. the central area of the atom
  8. 18. the temperature at which a given solid material changes from a solid state to a liquid or melts
  9. 19. has a definite volume but doesn't have a definite shape
  10. 21. a table with chemical elements organized by atomic numbers
  11. 22. the total amount of mass in the nucleus
Down
  1. 1. a row of chemical elements
  2. 3. a particle that has a negative charge of electricity and travels around a nucleus of an atom, no charge
  3. 4. No fixed volume,molecules are far apart and move around a lot
  4. 6. material formed by chemically bonding two or more chemical elements
  5. 7. anything that takes up space
  6. 10. has a definite shape and volume and molecules closely packed together
  7. 11. the temperature at which the vapor pressure is equal to the pressure of the gas above it
  8. 12. the vertical columns
  9. 13. a mixture in which the composition is uniform throughout the mixture
  10. 17. something that dissolves in fluids.
  11. 18. a physical combination of two or more substances that aren't chemically joined
  12. 20. a particle of matter that uniquely defines a chemical element