hydrogen
B2Technical/Scientific, increasingly in general news media.
Definition
Meaning
A chemical element, atomic number 1, symbol H, the lightest and most abundant element in the universe.
A colourless, odourless, highly flammable diatomic gas (H₂); or a single atom of this element forming part of a compound (e.g., in water, H₂O). In contemporary discourse, also refers to a potential clean fuel source when produced using renewable energy ('green hydrogen').
Linguistics
Semantic Notes
Primarily a scientific/technical term. In everyday contexts, it's almost always used in the compound 'hydrogen peroxide' (a disinfectant) or in discussions about energy/fuel. The word itself does not typically evoke the elemental gas but rather its applications or compounds.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling and pronunciation follow regional standards.
Connotations
Identical scientific connotations. In energy policy discourse, both regions use the term with the same technological/ecological implications.
Frequency
Comparable frequency in scientific and energy-related contexts in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
N of hydrogen (a molecule of hydrogen)hydrogen + N (hydrogen car)ADJ + hydrogen (liquid hydrogen)V + hydrogen (produce hydrogen)Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
'The company is investing heavily in green hydrogen infrastructure.'
Academic
'The reaction mechanism involves the transfer of a hydrogen atom.'
Everyday
'Be careful with that hydrogen peroxide; it can bleach fabrics.'
Technical
'Deuterium is an isotope of hydrogen with one neutron.'
Examples
By Part of Speech
verb
British English
- The process is designed to hydrogenate the vegetable oils.
American English
- Researchers aim to hydrogenate carbon dioxide into fuel.
adjective
British English
- The hydrogen-powered train completed its maiden voyage.
American English
- They installed a hydrogen-fuel cell for backup power.
Examples
By CEFR Level
- Water is made of hydrogen and oxygen.
- Some cars can run on hydrogen instead of petrol.
- The scientist explained how stars fuse hydrogen into helium.
- Critics argue that blue hydrogen, derived from natural gas, fails to address the root emissions problem.
Learning
Memory Aids
Mnemonic
Think of HYDRogen: it's the element in water (HYDRo-). Without it, water (H₂O) wouldn't exist.
Conceptual Metaphor
FUEL IS PROMISE (e.g., 'Hydrogen is the fuel of the future.'), PURITY IS LIGHTNESS (associated with being the lightest element).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Direct cognate 'водород' (vod-orod) literally means 'water-generator'. Ensure correct scientific context.
Common Mistakes
- Pronouncing it as /haɪˈdrɒ.dʒən/ (incorrect stress).
- Confusing 'hydrogen' (element) with 'oxygen'.
- Using as a countable noun incorrectly ('a hydrogen' vs. 'a hydrogen atom' or 'some hydrogen').
Practice
Quiz
What is the primary context in which the average person encounters the word 'hydrogen' in daily life?
FAQ
Frequently Asked Questions
No, hydrogen is a non-metal. Under extremely high pressures, it can exhibit some metallic properties, but under standard conditions, it is a gas and is classified as a non-metal.
When burned in oxygen, hydrogen produces only water vapour as a byproduct, releasing no carbon dioxide. However, its 'clean' status depends on how the hydrogen is produced; 'green hydrogen' made via electrolysis using renewable energy is considered truly clean.
No, breathing pure hydrogen is dangerous because it displaces oxygen, leading to asphyxiation. It is an asphyxiant gas.
Hydrogen (H) has one proton and one electron. Helium (He) has two protons, two neutrons, and two electrons. Hydrogen is highly flammable and reactive, while helium is inert, non-flammable, and lighter than air (except hydrogen).