Christopher's Crossword

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Across
  1. 2. matter with a defined volume, but no definite shape that can flow from one place to another
  2. 3. the process by which a liquid changes into a gas
  3. 6. region surrounding the nucleus of an atom where electrons are most likely to be found
  4. 7. movement of thermal energy from a substance at a higher temperature to a substance at a lower temperature
  5. 9. the process by which a gas changes into a solid
  6. 11. two or more atoms of the same element that have a different number of neutrons in the nuclei
  7. 13. element that is malleable, ductile, a good conductor for electricity and generally had a shiny or metallic luster
  8. 16. matter with a definite shape and volume, has tightly packed particles that move mainly by vibrating
  9. 18. changes in which the composition of a substance changes
  10. 19. change of matter from a solid state to a liquid state
  11. 20. negatively charged particle that exists in an electron cloud formation around an atom nucleus
Down
  1. 1. the process by which a solid changes directly into a gas
  2. 4. family of elements in the Periodic Table that have similar physical or chemical properties
  3. 5. anything that takes up space and has mass
  4. 8. number of protons in the nucleus of each atom of a given element, the top number on the Periodic Table
  5. 10. change of matter from a liquid state to a solid state
  6. 12. matter that does not have a defined shape or volume, particles move at high speeds in all directions
  7. 14. mass of an object divided by it's volume
  8. 15. force upward force exerted on an object immersed in a fluid
  9. 17. substance that cannot be broken down into simpler substances