The hydrogen lines in the spectrum indicate the presence of hydrogen gas.

Hydrogen acids are commonly used in chemical reactions.

Hydrogen sulphites are commonly used in food preservation.

Hydrogen halides are highly reactive compounds.

Hydrogen sulfites are commonly used in the food industry as preservatives.

There are many hydrogen stations in the city.

The hydrogen electrodes are essential components in fuel cells.

Hydrogen ions are essential for maintaining the pH balance in the body.

The hydrous pyrolyses were conducted in a controlled environment.

Many countries are transitioning to hydrogen economies to reduce carbon emissions.