Across
- 1. can be used to repel sharks
- 5. used in the most powerful magnets
- 7. 3/4 of all the elements are ________________
- 9. when copper is combined with this other element it makes bronze
- 13. most people picture it as white and chalky but it's actually a shiny metal
- 15. the number of elements that exist in nature
- 18. negatively charged particles in an atom
- 19. these particles have no electrical charge
- 21. there are ________________ human-made elements on the periodic table
- 22. these elements are not actually rare but are essential for electronics
- 23. each element is _____________ and unlike any other
- 25. elements are the basic ______________ _____________ of the universe
- 27. symbols of the major elements in the human body
- 28. deadly gas or pool chemical?
Down
- 2. the number of protons gives an element its _____________ _______________
- 3. atoms with perfectly filled outer shells are ___________
- 4. what happens inside a nuclear reactor
- 6. metals are shiny materials that conduct _______________
- 8. all the gold ever mined would fit in a cube about this many feet wide
- 10. metal used in wiring and plumbing
- 11. mixing dangerous sodium and chlorine creates this common condiment
- 12. the number of ____________ determines which element an atom is
- 14. it is now possible to see atoms with a very powerful _________________
- 15. used in advertising signs
- 16. these elements on the far right of the periodic table do not react
- 17. wouldn't have batteries without it
- 20. light super-strong metal used in spyplanes
- 24. Fiestaware bowls from the 1930s contained this dangerously radioactive element!
- 26. Superman wouldn't like it...