Science Crossword

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Across
  1. 2. vertical columns of elements on the periodic table
  2. 4. positively charged center of an atom containing protons and neutrons
  3. 5. pure substance that cannot be broken down into any other substance; one atom
  4. 6. neutral particles in the nucleus of an atom.
  5. 7. a table in which the elements are organized by their physical and chemical property
  6. 9. positively charged particles in the nucleus of an atom.
  7. 12. anything that has mass and occupies space
  8. 13. invisible negatively charged particles that orbits the nucleus of an atom
  9. 15. the smallest part of an element
  10. 16. change of state from solid to liquid.
  11. 17. horizontal row of elements on the periodic table
Down
  1. 1. change of state from solid to gas or gas to solid.
  2. 3. change of state from gas to liquid.
  3. 8. change of state from liquid to gas.
  4. 10. chemical combination of two or more elements in a specific ratio
  5. 11. change of state from liquid to solid.
  6. 14. solid,liquid, and gas.