Hydrogen is commonly found in water, but not as a pure substance.
hydrogen is majorly in h2o
oceans
the compounds that are found on Neptune are Hydrogen, Metane, Hydrogen deteride, and Ethane
gas
In the element oxygen.
hydrogen is most commonly found as a part of water with oxygen.
I think it is hydrogen
Hydrogen and Helium.
places
The two most common ones are hydrogen and helium gas
Because it's the most simple.