Noble Gas

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Across
  1. 3. The lightest of the noble gas
  2. 7. The german word of noble gas
  3. 8. It is used as a shielding gas for welding, and storage of sensitive chemicals.
  4. 10. One of the application of radon is used in
  5. 13. The element name Argon comes from the Greek word
  6. 14. A chemical element, an inert Group 18 (noble gas), used in electrical signs and fluorescent lighting
  7. 15. A chemical element, a Group 18 heavy radioactive gas of the periodic table, produced by the radioactive decay of radium.
Down
  1. 1. They indicate the melting and boiling points, The melting and boiling points increase as we move down the group, is an example of which properties?
  2. 2. The meaning of helios
  3. 4. A chemical element and a rare gas of the group 18 with atomic number 36.
  4. 5. The meaning of argos
  5. 6. Chemical symbol of krypton
  6. 9. Argon(Ar) is the third most abudant gas in Earths atmosphare after nitrogen and...
  7. 11. The other name for noble gas
  8. 12. A chemical element, a heavy and very rare gas from Group 18 of the periodic table