Xenon

14 definitions retrieved

Noble \No"ble\, a. [Compar. Nobler; superl. Noblest.] [F.
noble, fr. L. nobilis that can be or is known, well known,
famous, highborn, noble, fr. noscere to know. See know.]

1. Possessing eminence, elevation, dignity, etc.; above
whatever is low, mean, degrading, or dishonorable;
magnanimous; as, a noble nature or action; a noble heart.
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Statues, with winding ivy crowned, belong
To nobler poets for a nobler song. --Dryden.
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2. Grand; stately; magnificent; splendid; as, a noble
edifice.
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3. Of exalted rank; of or pertaining to the nobility;
distinguished from the masses by birth, station, or title;
highborn; as, noble blood; a noble personage.
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Note: Noble is used in the formation of self-explaining
compounds; as, noble-born, noble-hearted, noble-minded.
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Noble gas (Chem.), a gaseous element belonging to group
VIII of the periodic table of elements, not combining with
other elements under normal reaction conditions;
specifically, helium, neon, argon, krypton,
xenon, or radon; also called inert gas.

Noble metals (Chem.), silver, gold, and platinum; -- so
called from their resistance to oxidation by air and to
dissolution by acids. Copper, mercury, aluminium,
palladium, rhodium, iridium, and osmium are sometimes
included.
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Syn: Honorable; worthy; dignified; elevated; exalted;
superior; sublime; great; eminent; illustrious;
renowned; stately; splendid; magnificent; grand;
magnanimous; generous; liberal; free.
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Xenon \Xen"on\ (z[e^]n"[o^]n; z[=e]"n[o^]n), n. [Gr. xe`non,
neut. of xe`nos strange.] (Chem.)
A very heavy, inert gaseous element of the noble gas group,
occurring in the atmosphere in the proportion of one volume
is about 20 millions. It was discovered by Ramsay and Travers
in 1898. It can be condensed to a liquid boiling at -107[deg]
C., and to a solid which melts at -111.9[deg] C. Symbol Xe
(formerly also X); atomic number 54; atomic weight 131.3.
[Webster 1913 Suppl. +PJC]

xenon
n 1: a colorless odorless inert gaseous element occurring in the
earth's atmosphere in trace amounts [syn: xenon, Xe,
atomic number 54]

xenon
Symbol: Xe
Atomic number: 54
Atomic weight: 131.30
Colourless, odourless gas belonging to group 18 on the periodic table (the
noble gases.) Nine natural isotopes and seven radioactive isotopes are
known. Xenon was part of the first noble-gas compound synthesized.
Several others involving Xenon have been found since then. Xenon was
discovered by Ramsey and Travers in 1898.