Physics Crossword puzzle!!!!!!!!!!!!!!!

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Across
  1. 3. Symbol is B
  2. 4. Has the atomic number 19
  3. 6. Atomic number is 7
  4. 8. Singer with blonde hair and blue eyes (NOT Billie Eilish)
  5. 10. Has C as its symbol
  6. 11. The overall weight of an object
  7. 12. A property of matter
Down
  1. 1. Is A letter in the alphabet
  2. 2. Has the atomic number 1
  3. 5. Has a mass of 24.305
  4. 7. Atomic mass is 15.999
  5. 9. Symbol is Fr