Helium (He) and water
Helium and water: reaction mechanisms, environmental impact and health effects
Helium is the second most prevalent element in the universe, after hydrogen. However, the atmosphere contains only 5 ppm volume of helium. Helium concentrations in seawater are no higher than 4-7 ppt. Concentrations are relatively low, because helium as a noble gas only occurs as separate atoms, and usually does not react with any other particles.
In what way and in what form does helium react with water?
Solubility of helium and helium compounds
Helium does not dissolve in water, and therefore normally does not damage the environment. As was described earlier, helium is only present in water in very small amounts. Helium is not a dietary mineral for any organism. There are two separate helium isotopes that are both non-radioactive. Today, six other unstable isotopes exist.