The half life of 238U is 4,468.109 years; this is a very long halflife !
The approximate half life of Uranium 238 is 4.5 x 109 years.
Uranium 238 is a natural isotope of uranium, non-fissionable with thermal neutrons, with an atomic mass of 238,050 788 247 ± 0,000 002 044 u.a. and a half life of 4,468 x 109 years, atomic number 92. Natural uranium contain 99.2745 % U 238 (atomic); the desintegration of U 238 is alpha type.
The half life of the radioactive isotope of iodine comes into play when it is being prescribed as treatment for some thyroid conditions. In order for the material to be of the correct strength, it has to be prepared, delivered and administered at just the right time.
The characteristic of the uranium-238 isotope that makes it useful for dating rocks is its long half-life of about 4.5 billion years. This allows for accurate dating of rocks that are billions of years old.
Uranium has 29 natural and artificial isotopes. Each isotope has his specific half life; for the natural isotopes the half lifes are: U 234: approx. 2.45 x 105 years U 235: approx. 7.04 x 108 years U 238: approx. 4.46 x 109 years
The approximate half life of Uranium 238 is 4.5 x 109 years.
The half-life of the isotope uranium-238 is 4 468 000 000 years.
The half-life of uranium-238 is about 4.5 billion years. This means that it takes 4.5 billion years for half of a sample of uranium-238 to decay into thorium-234.
The half-life of uranium-235 is approximately 703.8 million years, while the half-life of uranium-238 is approximately 4.5 billion years.
The most common form of uranium is uranium-238, which has a half-life of about 4.5 billion years. This means that it takes 4.5 billion years for half of a sample of uranium-238 to decay into lead-206.
Uranium
This is an alpha decay.The half-life of uranium-238 is 4,468.10ex.9 years.
4.47 billion years
The half-life of 238U is 4,468x109 years.
Radioactivity can persist on uranium for billions of years, as uranium has a very long half-life. The most common isotope of uranium, uranium-238, has a half-life of about 4.5 billion years. Uranium-235, another isotope, has a shorter half-life of about 700 million years.
It takes billions of years for uranium to decay into lead. Uranium-238, the most common isotope of uranium, has a half-life of about 4.5 billion years, meaning it takes that long for half of a sample of uranium-238 to decay into lead-206.
Uranium-238 has a half-life of about 4.5 billion years. The Earth is estimated to be about 4.5 billion years old, so if uranium-238 crystallized at the same time the Earth formed, it would have undergone approximately one half-life since then. This means that about half of the original amount of uranium-238 would remain today.