Chemistry Crossword Puzzle

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Across
  1. 2. a form of matter that flows to conform to the shape of its container and fills the entire volume
  2. 4. a _________ property is the abilty of a substanceto combine with or change into one or more other substances
  3. 8. the conversation of an atom of one element to an atom of another element
  4. 9. a _________ property is a characteristic that can be observed or measured without changeing the sample's composition
  5. 12. a subatomic particle with a negitive charge
  6. 17. Half ______ is the time it takes for Half of the radioactive nuclei to decay to the most stable nuclei
  7. 18. a subatomic particle with no charge
  8. 19. a ratio that compares the mass of an object to its volume
  9. 20. the colums on the periodic table of elementsli
Down
  1. 1. Group __ elements only have one valence electron
  2. 3. a form of matter that has its own definite shape and volume
  3. 5. refers to how close a measured value is to an accepted value
  4. 6. a russian chemist who sorted the elements by atomic mass
  5. 7. refers to how close a series of measurement are to one another
  6. 10. a form of matter that flows, has a contant volume,and takes the shape of its container
  7. 11. the rows on the periodic table of elements
  8. 13. a subatomic particle with a positive charge
  9. 14. Properties of _______ : ductile,conduct of electricty,conduct of heat,have luster,and malleable
  10. 15. a german chemist sorted the elements by atomic number
  11. 16. anything that has mass and takes up space