Xenon is 11 times as soluble as helium in water at 0°C as xenon has much more shells and hence is freely attached to the water.
What are the consequences?
As a result, helium and xenon are both noble gases. But because it is far lower on the periodic table, it is also significantly larger than helium.
It, therefore, contains many more electron shells since it is bigger.
Therefore, larger electron shells in xenon will be held considerably less firmly than they are in helium.
The result of this is that they interact with water; helium's firmly bound electrons are less so than xenon's more loosely held electrons, which interact with water in a way that allows helium to dissolve or split up into smaller molecules on a molecular level.
