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hydrogen

noun C1 Academic

Meaning

Hydrogen is a colorless, odorless, and highly flammable diatomic gas (H₂) that serves as the simplest and most abundant element in the universe, playing a crucial role in various chemical reactions, including the formation of water and organic compounds,
💡 While "hydrogen" is often associated with energy production and fuel cells, it is important to distinguish between its various forms and applications, particularly in scientific contexts where precision is crucial.

Example Sentences

Hydrogen is a clean fuel that produces only water when burned .
Hydrogen is a key element in sustainable energy production methods .
Hydrogen is becoming a key resource in sustainable energy projects .

Word in Context

At the science museum , Maya lingered before a glowing panel that summarized the role of hydrogen in everyday chemistry . The exhibit contrasted simple diagrams of atoms with dynamic models showing how hydrogen combines with oxygen to form water , which helped her visualize an abstract concept . A museum guide nearby elaborated on hydrogen's abundance in the universe and its potential for clean energy , but he emphasized the technical challenges that still need to be solved . Maya jotted down a few phrases and resolved to read further that evening , feeling both curious and slightly overwhelmed by the subject's breadth . By the time she left , the clear explanations had turned a vague awareness into a practical understanding she could discuss with classmates .

Common Phrases

hydrogen fuel cells hydrogen bonding hydrogen isotopes

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