Word: Hydrogen

Pronunciation

/ˈhaɪdrədʒən/

Definitions

• Noun: The chemical element with the atomic number 1 and represented by the symbol H. It is a colorless, odorless, tasteless, and highly flammable gas that occurs naturally as the most abundant element in the universe.

Example Sentence:

• “Hydrogen is the lightest and simplest chemical element, consisting of only one proton and one electron in its most common form.”

Phrases

• “Hydrogen fuel cell”: A device that generates electricity through the chemical reaction between hydrogen and oxygen, producing water as its byproduct.
• “Hydrogen bond”: A type of intermolecular force that occurs when a hydrogen atom bonded to a strongly electronegative atom (like oxygen or nitrogen) is attracted to another electronegative atom.
• “Hydrogen economy”: A hypothetical future economic system where hydrogen is the primary energy carrier, replacing fossil fuels.

Example Sentences

• Noun: “The star’s fusion process involves the conversion of hydrogen into helium.”
• “The spacecraft was powered by liquid hydrogen fuel.”

Synonyms

• H2 (chemical formula)
• Atomic hydrogen
• Molecular hydrogen

Note: While “hydrogen” doesn’t have different part-of-speech uses like the example given, it can be used in compound nouns (e.g., ‘hydrogen peroxide’) or verbs (e.g., ‘to hydrogenate’), but these typically involve a change in meaning beyond the base noun definition provided above.