heavy nitrogen: meaning, definition, pronunciation and examples
Very LowTechnical / Scientific
Quick answer
What does “heavy nitrogen” mean?
Nitrogen-15, a stable, naturally occurring isotope of nitrogen with one extra neutron.
Audio
Pronunciation
Definition
Meaning and Definition
Nitrogen-15, a stable, naturally occurring isotope of nitrogen with one extra neutron.
A stable isotope of nitrogen (¹⁵N) used as a tracer in scientific research, especially in biology, chemistry, and environmental science, to study metabolic pathways, nutrient cycles, and protein synthesis.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or grammatical differences. Usage is identical across scientific communities.
Connotations
Purely denotative and scientific; no additional cultural connotations.
Frequency
Extremely low frequency in general language, used exclusively in specialised scientific contexts (e.g., biochemistry, geology, agriculture). Frequency is equivalent in UK and US academic journals.
Grammar
How to Use “heavy nitrogen” in a Sentence
The researchers used [heavy nitrogen] to trace [noun phrase].The [noun phrase] was labelled with [heavy nitrogen].An increase in [heavy nitrogen] indicates [noun phrase].Vocabulary
Collocations
Examples
Examples of “heavy nitrogen” in a Sentence
verb
British English
- The protein was heavy-nitrogen-labelled for the experiment.
- They plan to heavy-nitrogen-enrich the sample.
American English
- The protein was labeled with heavy nitrogen for the experiment.
- They plan to enrich the sample with heavy nitrogen.
adverb
British English
- N/A
American English
- N/A
adjective
British English
- The heavy-nitrogen tracer revealed new metabolic pathways.
- We analysed the heavy-nitrogen content of the soil.
American English
- The heavy nitrogen tracer revealed new metabolic pathways.
- We analyzed the heavy nitrogen content of the soil.
Usage
Meaning in Context
Business
Virtually never used. Might appear in highly specialised biotech or agricultural science investment reports.
Academic
Primary context. Used in research papers across biological, chemical, environmental, and geological sciences.
Everyday
Never used in everyday conversation.
Technical
Core usage. Essential terminology in isotopic labeling, mass spectrometry, metabolic studies, and nutrient cycling research.
Vocabulary
Synonyms of “heavy nitrogen”
Strong
Neutral
Weak
Vocabulary
Antonyms of “heavy nitrogen”
Watch out
Common Mistakes When Using “heavy nitrogen”
- Using 'heavy nitrogen' to refer to nitrogen gas under high pressure.
- Using it as a synonym for 'nitrogen fertilizer'.
- Incorrect pluralisation ('heavy nitrogens') – it is a non-count noun referring to a substance/isotope.
FAQ
Frequently Asked Questions
No, nitrogen-15 (heavy nitrogen) is a stable isotope. It does not decay radioactively.
Yes, but it is a specialised chemical product. It is sold in enriched form (e.g., as ¹⁵N-labeled ammonium salts or gases) for research purposes from scientific supply companies, and it is very expensive.
'Regular' nitrogen (over 99% of natural nitrogen) is nitrogen-14 (¹⁴N), with 7 protons and 7 neutrons. Heavy nitrogen is the isotope nitrogen-15 (¹⁵N), with 7 protons and 8 neutrons, making it slightly heavier.
In its common chemical forms (e.g., labeled salts), it is no more chemically dangerous than normal nitrogen compounds. The hazard depends on the specific compound (e.g., ammonia is toxic), not the isotope itself. It poses no radiation hazard.
Nitrogen-15, a stable, naturally occurring isotope of nitrogen with one extra neutron.
Heavy nitrogen is usually technical / scientific in register.
Heavy nitrogen: in British English it is pronounced /ˌhevi ˈnaɪ.trə.dʒən/, and in American English it is pronounced /ˌhevi ˈnaɪ.trə.dʒən/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “N/A”
Learning
Memory Aids
Mnemonic
Think of 'heavy' as 'weighs more' on the atomic scale. Nitrogen usually has 14 atomic mass units (¹⁴N), but 'heavy nitrogen' has 15 (¹⁵N), like a heavier sibling.
Conceptual Metaphor
TRACING IS FOLLOWING A LABEL (e.g., 'Heavy nitrogen allowed us to trace the protein's path through the organism.').
Practice
Quiz
What is 'heavy nitrogen' primarily used for?