phisics

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Across
  1. 4. the most common element in the universe
  2. 6. a metal that can float on water
  3. 7. how many windows in this room
  4. 10. the subs name
  5. 11. my last name
Down
  1. 1. the best person ever
  2. 2. never found naturally in its pure form
  3. 3. mainly found in stars
  4. 4. so light it can escape the earth's atmosphere
  5. 5. is the most receptive and electronegative of all the chemical elements
  6. 8. third most abundant element in the universe
  7. 9. 2/3 the density of aluminium