strontium
C2Technical / Scientific
Definition
Meaning
A soft, silver-yellow metallic chemical element (symbol Sr, atomic number 38), highly reactive with air and water.
A chemical element, typically found in minerals like celestine and strontianite, used in various applications such as pyrotechnics (for red colour in fireworks), certain alloys, and historically in cathode-ray tube glass and radioactive isotopes for medical treatments.
Linguistics
Semantic Notes
The primary semantic field is chemistry and materials science. It is almost always used as a mass noun. When referring to the element in general or its compounds, it is non-count. The countable form is rare and would refer to specific types or isotopes (e.g., 'the two strontiums').
Dialectal Variation
British vs American Usage
Differences
No significant lexical or usage differences. Spelling and pronunciation follow general BrE/AmE conventions for the word itself.
Connotations
None beyond the technical/scientific meaning. In both varieties, it strongly connotes chemistry, periodic table, and its most common public association: red fireworks.
Frequency
Equally low-frequency in both dialects, confined to scientific, industrial, and educational contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
Strontium is used in [application][Compound] contains strontiumThe isotope strontium-[number]Vocabulary
Synonyms
Strong
Neutral
Usage
Context Usage
Business
Rare, except in specific industries like specialty chemicals, fireworks manufacturing, or nuclear-related fields.
Academic
Common in chemistry, geology, environmental science, and medical physics textbooks and research papers.
Everyday
Very rare. Most likely encountered in the context of fireworks ('the red colour comes from strontium') or historical mentions of radioactive fallout ('strontium-90 in milk').
Technical
The primary domain. Used precisely to discuss chemical properties, isotopic ratios in dating, or material compositions.
Examples
By Part of Speech
adjective
British English
- The strontium-based pigment produced a brilliant red.
- They studied strontium-rich minerals from the site.
American English
- The strontium compound produced a vivid red color.
- They analyzed strontium-containing groundwater samples.
Examples
By CEFR Level
- Some fireworks get their red colour from strontium.
- Strontium is an element on the periodic table.
- Geologists can use strontium isotopes to trace the origin of ancient artefacts.
- Strontium carbonate is a key ingredient in the production of red signal flares.
- The remediation project aimed to reduce leaching of radioactive strontium-90 from the contaminated soil.
- Analysis of the enamel strontium/calcium ratios provided clues about the prehistoric diet.
Learning
Memory Aids
Mnemonic
Think of STRONG-TEA-um: The STRONG red colour in TEA-lightful fireworks comes from STRONTIUM. (Links the sound to its most famous property.)
Conceptual Metaphor
ELEMENT AS AGENT / SOURCE (e.g., 'Strontium gives fireworks their crimson hue.')
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Direct cognate: 'стронций' (strontsiy). Pronunciation and spelling are very similar, so no major trap. The concept is identical.
Common Mistakes
- Mispronunciation: /stroʊnˈʃəm/ (adding a 'sh' sound).
- Misspelling: 'strontim', 'strontum'.
- Confusing with 'scandium' or 'yttrium' (other metallic elements).
Practice
Quiz
In which of these fields is strontium most frequently discussed?
FAQ
Frequently Asked Questions
Elemental strontium metal is reactive and can be hazardous, but its common compounds (like strontium carbonate in fireworks) are stable. The radioactive isotope strontium-90 is dangerous due to its radioactivity and ability to mimic calcium in bones.
It is most famous for producing the bright red colour in fireworks and flares. It is also known from the mid-20th century as a hazardous component of nuclear fallout (strontium-90).
It is named after Strontian, a village in Scotland, where the mineral strontianite (which contains the element) was first discovered.
Trace amounts of stable (non-radioactive) strontium are naturally present in the human body, primarily in bones, as it is chemically similar to calcium. It is not considered an essential nutrient.