Chemistry

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Across
  1. 1. most abundant element in Earth's oceans
  2. 4. needed to make table salt
  3. 6. this element has 26 neutrons
  4. 8. all living organisms are based on this element
  5. 9. a heavy metal -- Pb
  6. 11. atomic #50
  7. 13. needed to make salt
  8. 14. a noble gas
  9. 17. which is most reactive: zinc, argon, cesium, curium
  10. 18. the most important metalloid
  11. 20. atomic symbol K
Down
  1. 2. which one is not a metalloid: boron, arsenic, gallium, pollonium
  2. 3. the only non-metal that is liquid at room temperature
  3. 5. the only metal that is liquid at room temperature
  4. 7. atomic #74 -- W
  5. 10. Ag
  6. 12. important to your bone structure
  7. 15. this metal is the name of a US currency
  8. 16. which one is a noble gas: hydrogen, boron, pluton, xenon
  9. 19. this element has five energy shells and seven valence electrons