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
Hydrogen is the element commonly found in the Earth's crust, living matter, oceans, and atmosphere. Mercury, neon, and argon are also found in various environments, but hydrogen is the most abundant element in these specific areas.
Oxygen, hydrogen, halogens
Because it's the most simple.