astatine: meaning, definition, pronunciation and examples
RareScientific/Technical
Quick answer
What does “astatine” mean?
A highly unstable, radioactive chemical element with the symbol At and atomic number 85.
Audio
Pronunciation
Definition
Meaning and Definition
A highly unstable, radioactive chemical element with the symbol At and atomic number 85.
A halogen element that occurs naturally in minute quantities from the radioactive decay of uranium and thorium. It has no stable isotopes and is the rarest naturally occurring element in the Earth's crust.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Pronunciation differs (see IPA).
Connotations
Neutral scientific term in both variants.
Frequency
Equally rare in both UK and US contexts, confined to chemistry, physics, and related technical fields.
Grammar
How to Use “astatine” in a Sentence
Astatine is + adjective (e.g., unstable, rare)The + noun (element/isotope) + astatineAstatine + verb (e.g., decays, forms)Vocabulary
Collocations
Examples
Examples of “astatine” in a Sentence
verb
British English
- The sample was astatined for the experiment. (Theoretical/coined)
American English
- Researchers aim to astatinate the organic molecule. (Theoretical/coined)
adverb
British English
- The material decayed astatinely. (Theoretical/coined)
American English
- The reaction proceeded astatinely fast. (Theoretical/coined)
adjective
British English
- The astatine compound exhibited unique properties.
American English
- They studied the astatine isotope's half-life.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in advanced chemistry, physics, and nuclear medicine research papers.
Everyday
Extremely uncommon; only in general science discussions or trivia.
Technical
Primary domain. Used in nuclear chemistry, radiopharmaceuticals (e.g., astatine-211 for targeted alpha therapy), and particle physics.
Vocabulary
Synonyms of “astatine”
Vocabulary
Antonyms of “astatine”
Watch out
Common Mistakes When Using “astatine”
- Misspelling as 'astatine' (correct), 'astatin', or 'astatene'.
- Mispronunciation with stress on the second syllable.
- Confusing it with the more common 'antimony'.
FAQ
Frequently Asked Questions
No, astatine is classified as a halogen, a group of non-metals. However, some predictions suggest it might have metallic properties under certain conditions due to its position in the periodic table.
Not in any substantial quantity. Any macroscopic amount would immediately vaporise itself due to the heat from its intense radioactivity. It is typically studied in trace amounts.
Its main potential use is in nuclear medicine. The isotope astatine-211 is being researched for targeted alpha-particle therapy to treat certain cancers, as it can deliver radiation very precisely to small clusters of cancer cells.
It was first synthesised in 1940 by Dale R. Corson, Kenneth Ross MacKenzie, and Emilio Segrè at the University of California, Berkeley, by bombarding bismuth-209 with alpha particles. Tiny traces were later confirmed to exist in nature.
A highly unstable, radioactive chemical element with the symbol At and atomic number 85.
Astatine is usually scientific/technical in register.
Astatine: in British English it is pronounced /ˈastətiːn/, and in American English it is pronounced /ˈæstəˌtiːn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “N/A”
Learning
Memory Aids
Mnemonic
Think: 'A STATe of decay' – Astatine is an element that is never in a stable state because it's highly radioactive.
Conceptual Metaphor
EPHEMERALITY/SCARCITY (e.g., 'as rare as astatine').
Practice
Quiz
What is the primary reason astatine is so rarely encountered?