Periodic Table

1234567891011121314
Across
  1. 5. noble gas used in some bright signs
  2. 8. element that gives bananas their potassium.
  3. 10. radioactive element used in nuclear reactors, symbol "U."
  4. 11. heaviest naturally occurring noble gas
  5. 12. only metal that is liquid at room temperature
  6. 13. gas makes up about 78% of the earth's atmosphere
  7. 14. first element in Group 2 of the periodic table
Down
  1. 1. element with the symbol "Fe"
  2. 2. element with the atomic number 79, often used in jewelry
  3. 3. halogen with the symbol "Cl."
  4. 4. element's symbol is "Pb" and used in old pipes
  5. 6. The most abundant metal in earth's crust
  6. 7. element that diamonds are made of
  7. 9. lightest element in the universe