1gas raro masculino
- There is reason to believe that we might profitably mine for rare gases in the dusty regolith.
- These elements have been known as the rare gases, but some of them are not especially rare.
- Both utilize large, long-lived, and relatively expensive bulbs filled with various combinations of rare gases and a remote ballast.
- The low reactivity of the rare gases is due to the arrangement of electrons in the rare gas atoms.
- The lamp includes a bulbous envelope filled with rare gas and metal vapor and a reentrant cavity.