Science crosword

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Across
  1. 2. Force÷area
  2. 7. a force may cause an object turn about a pivot
  3. 9. moment÷force
  4. 11. All the matter consist in _____
  5. 12. First element on the periodic table
  6. 13. Horizontal lines on the periodic table
  7. 14. Vertical lines on the periodic table
  8. 16. Chemichal symbol of sodium
  9. 17. An object to transfer enrgy to electrons
  10. 18. the total number of protons and neutrons
Down
  1. 1. mass÷volume
  2. 3. The transfer of heat by electromacnetic waves
  3. 4. A device to meashure amps
  4. 5. something that defines the name of an element
  5. 6. Meashure of how much electric charge flows on a circuit
  6. 8. An imbalance of electric charges
  7. 10. A small type of battery
  8. 15. Element whose chemichal symbol is "K"