Periodic Table Crossword Puzzle(Zatone Fraser II)

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Across
  1. 3. a substance is its mass per unit volume.
  2. 5. table-a table of the chemical elements arranged in order of atomic number
  3. 8. basic unit of a chemical element
  4. 11. number-number of protons in the nucleus
  5. 13. Danish physicist who investigated atomic structure and radiation.
  6. 14. positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
  7. 16. charge
  8. 17. a substance or matter in a state in which it will expand freely to fill the whole of a container
  9. 18. large body of matter with no definite shape.
  10. 19. Russian chemist who developed a periodic table of the chemical elements
Down
  1. 1. packed together and contain the least amount of kinetic energy
  2. 2. positive electric charge
  3. 4. charge
  4. 6. substance that flows freely but is of constant volume
  5. 7. mass-the mass of an atom
  6. 9. cloud-the system of electrons surrounding the nucleus of an atom.
  7. 10. group of atoms bonded together
  8. 12. thing that is composed of two or more separate elements
  9. 15. be chemically interconverted or broken down into simpler substances