This is the 11845th most frequent Spanish word.
hidrógeno
Hydrogen: a colorless, odorless chemical element that is the lightest and most abundant in the universe.
In this sentence, 'hidrógeno' is used as the subject and refers to the chemical element.
El hidrógeno es el elemento químico más abundante en el universo.
Hydrogen is the most abundant chemical element in the universe.
Here, 'hidrógeno' describes a type of fuel, used as an attributive modifier.
Los combustibles de hidrógeno son una alternativa sostenible a los combustibles fósiles.
Hydrogen fuels are a sustainable alternative to fossil fuels.
In this sentence, 'hidrógeno' refers to the actual substance released, demonstrating its role in a chemical process.