The maximum dimensions for your carry-on bag are: Length - 24 (61cm) including wheels and handles ; Width - 17 (43cm) Height - 10 (25cm) For additional carry-on items beyond the one-bag limit, each piece will incur a fee. Refer to the checked baggage page for more information.
Tritium (3H) is the most stable radioisotope of hydrogen. That is, of all radioactive isotopes of hydrogen, tritium is the least radioactive. It has a proton and 2 neutrons in its nucleus. Tritium decays through beta minus decay and changes to helium-3. It has a half-life of 12.32 years.
Uranium-238 is the most stable isotope of uranium, with a half-life of about 4.468Ã10 years, roughly the age of the Earth. Uranium-235 has a half-life of about 7.13Ã10 years, and uranium-234 has a half-life of about 2.48Ã10 years.