Nothing will happen. Helium is completely nonreactive.
Helium is formed by the fusion of hydrogen at temperatures above 3.106 kelvin.
You get a mixture of hydrogen and xenon.
It gets softer.
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Hydrogen and helium are the two most abundant elements in the universe.
Helium is completely inert, it is the most inert of all elements, and so it will not react in any way with hydrogen (or with any other element). So, if you mix hydrogen and helium, nothing happens. You have a mixture of hydrogen and helium. It's a lot lighter than air, you can make balloons that will float. Of course, you can do that with pure hydrogen or with pure helium, as well.
Oxygen, Hydrogen and Helium.
because helium does not mix with other elements
Because helium will not mix with hydrogen and oxygen.
Helium is formed by the fusion of hydrogen at temperatures above 3.106 kelvin.
Nuclear fusion, in which hydrogen-1 is fused into helium-4.
hydrogen particles mix with helium particles
It gradually gets converted into helium.
You get a mixture of hydrogen and xenon.
Nothing as helium and radon are noble or non-reactive gasses.
water
Hydrogen and helium