Navy Seals Recruitment Basic Enlistment Requirements. Joining any branch of the military involves meeting certain enlistment requirements and standards that must be met prior to acceptance. For example, most military branches have the same age and citizenship requirements.
The noun XENON has 1 sense: 1. a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts. Familiarity information: XENON used as a noun is very rare.
Isotopes of xenon. Naturally occurring xenon (54Xe) is made of eight stable isotopes and one very long-lived isotope. (124Xe, 126Xe, and 134Xe are predicted to undergo double beta decay, but this has never been observed in these isotopes, so they are considered to be stable.) Xenon has the second highest number of stable isotopes.