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.
Therefore it has no half-life. Answer Hydrogen is an element that occurs in nature in three isotopes. Hydrogen-1, 1H, which is also called protium, accounts for about 99.985% of all hydrogen on Earth. Hydrogen-2, 2H, which is also called deuterium, is about 0.015% of the hydrogen on Earth.