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Across
  1. 2. the second or third letter in an elements representation on the periodic table
  2. 5. object has changed into new substance
  3. 7. an element on the periodic table represented as Si
  4. 8. any singular element with a nucleus, protons, and nuetrons
  5. 9. object has only changed in appearance
  6. 11. a type of chart used to show all the known elements on earth
  7. 12. number of atoms of one element in a compound
Down
  1. 1. number of total compound
  2. 3. a single atom of a pure substance found on the periodic table
  3. 4. the formula for a compound made of elements, subscripts, and coefficients
  4. 6. 2 or more elements chemically combined
  5. 10. the type of letter that represents a element on the periodic table