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