MATTER

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Across
  1. 2. invisible building block of all matter.
  2. 4. A proton is a stable, positively charged subatomic particle found within the nucleus of every atom.
  3. 7. the 118 things on the periodic table
  4. 8. when atoms from different elements combine, creating a substance with new properties
  5. 9. A negitive charged particle that orbits the nucleus of an atom
  6. 10. positive charge in the center core of an atom
Down
  1. 1. takes up space and mass
  2. 3. physical combination of 2 or more substances
  3. 5. particle found in the nucleus of an atom
  4. 6. has groups and periods and made by Dmitri Mendeleev