Science Choice Board Crossword

1234567891011
Across
  1. 1. properties that can be observed during a chemical reaction
  2. 3. a pure substance made of two or more elements that are chemically combine to form a "new substance
  3. 4. a change affecting the apperence but not chemical makeup
  4. 6. verticle collums on the periodic table
  5. 9. he created the first periodic tabel in 1869
  6. 11. number of protons and neutrons found within the nucleus of an atom
Down
  1. 2. number of protons in an atom
  2. 4. property that can be observed without changing it into another substance
  3. 5. A change that occurs when one or more substances change into an entirely new substance
  4. 7. the ability to dissolve into another substance
  5. 8. horizontal rows on the periodic table
  6. 10. A pure substance that cannot be broken down into simpler substances