Periodic Table of Elements

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Across
  1. 2. World wide over 771 million tons are produced annually
  2. 4. Discovered in 1766
  3. 5. Poor conductor
  4. 6. Melting point is 1,202F
  5. 10. Discovered in 9000 BC
  6. 11. Not malleable
  7. 13. Discovered by Andres Manuel Del Rio
  8. 14. Strong metallic luster
Down
  1. 1. One of the rarest gases on Earth
  2. 3. Good heat and electricity conductor
  3. 7. Non-Toxic as an element along with all its natural forms
  4. 8. Unreactive in its crystal form
  5. 9. 45 neutrons
  6. 11. First metal to be discovered
  7. 12. 31 Protons
  8. 14. Pure form has no odor