leo chemistry project

123456789
Across
  1. 3. The number in a chemical equation that says how many atoms of an element there is
  2. 5. Is equal to the atomic number
  3. 8. A pure substance that cannot be broken down
  4. 9. mass Is the sum of protons and neutrons
Down
  1. 1. The rows on a periodic table
  2. 2. The columns on a periodic table
  3. 3. Represents an element
  4. 4. The result of a chemical reaction
  5. 6. table Organized chart of elements
  6. 7. reaction A complete new substance