science terms

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Across
  1. 4. the states in which matter can exist
  2. 6. a particle that can either be bound to an atom or free
  3. 8. the organized array of all of the chemical elements in order
  4. 11. a sample of matter that conforms to the shape of the container it is held at
  5. 12. the structure of an atom comprising a nucleus
  6. 14. a basic part of a whole
  7. 15. the amount of space occupied by a three dimensional figure
  8. 16. the quantity of matter contained in an atom of an element
  9. 18. a subatomic particle found in the nucleus of every atom except that of simple hydrogen
  10. 19. anything that takes up space or can be weighed
Down
  1. 1. a substance made from two or more different elements that have been chemically joined
  2. 2. fluid that has neither an independent shape nor volume
  3. 3. a subatomic particle found in the nucleus of every atom
  4. 5. a mixture of one or more solutes dissolved in a solvent
  5. 7. the smallest particle of a substance that has all of the physical and chemical properties of that substance
  6. 9. the capacity for doing work
  7. 10. amount of space that matter occupies
  8. 12. the number of protons in the nucleus of an atom
  9. 13. a tool that measures temperature
  10. 17. a particle of matter that defines a chemical element
  11. 20. a simple substance that cannot be broken into smaller parts or changed into a different substance