Hydrogen is the lightest and most abundant ... gas that is present in a very small part of the atmosphere. The chemical ...

The US Arctic Research Commission and the UAF Geophysical Institute hosted a workshop on the energy potential of geologic hydrogen.

It's not difficult to remember the elemental symbol for hydrogen (H) or that it is the most common element in the universe. But what do you do when you're an ambulance medic and the pile-up you've ...

join with another hydrogen atom as a pair, making a molecule. Sometimes it is easy to tell which element a symbol stands for. For example, C stands for carbon and Li stands for lithium.