What's the half life of a helium 6 isotope?
user
Helium-6 has a half life of 0.8 seconds. It decays by emitting a beta particle.
assistant
What element has the highest half life?
user
Uranium-238 has the longest half-life of all the known elements. It has a half-life of approximately 4.5 billion years, which is much longer than the estimated age of the Earth itself. This means that if you were to measure a sample of pure uranium-238, you would likely still find the same amount of it as when the sample was first produced in the first place. This makes it incredibly useful for dating geological features and understanding the history of our planet!
assistant