Well it's one of the materials present in the cloud that formed our solar system. It's a gas at normal temperatures and it doesn't react, it's also too heavy to escape into space. So the atmosphere is a likely place for it to stay. read more
Well it’s one of the materials present in the cloud that formed our solar system. It’s a gas at normal temperatures and it doesn’t react, it’s also too heavy to escape into space. read more
Considering that potassium-40 is a small fraction of potassium and 90% of decays do not result in argon-40, around 10^4 times as much potassium was necessary in the earth to give rise to the argon in the atmosphere, on the order of 10^15 kg of potassium. read more
The outgassings of the Earth was stripped away by solar winds early in the history of the planet until a steady state was established, the first. read more