Chemical puzzle quiz

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Across
  1. 7. the power of solar radiation per unit area
  2. 9. represents number of protons found in one atom
  3. 10. substnace whose atoms that have the same number of protons
Down
  1. 1. amount of matter that makes up an object
  2. 2. short term weather
  3. 3. long term weather
  4. 4. a column in the periodic table of the chemical elements
  5. 5. anything that takes up space and can be weighed
  6. 6. Horizontal rows of the periodic table
  7. 8. capacity to supply heat or do work