bohr radius: meaning, definition, pronunciation and examples
very lowspecialized technical, academic
Quick answer
What does “bohr radius” mean?
The most probable distance between the nucleus and the electron in a hydrogen atom in its ground state, a fundamental physical constant of atomic physics.
Audio
Pronunciation
Definition
Meaning and Definition
The most probable distance between the nucleus and the electron in a hydrogen atom in its ground state, a fundamental physical constant of atomic physics.
A specific physical constant (a0 ≈ 5.29×10⁻¹¹ m) that represents the scale of atoms in the Bohr model of hydrogen, often used as a natural unit of length in atomic physics.
Dialectal Variation
British vs American Usage
Differences
Identical; a scientific constant with no regional variation in meaning or usage.
Connotations
None beyond its scientific precision.
Frequency
Used exclusively in physics, chemistry, and quantum mechanics contexts; frequency identical in UK and US academic settings.
Grammar
How to Use “bohr radius” in a Sentence
The Bohr radius [is/equals/approximates] 5.29×10⁻¹¹ m.The orbital extends to [number] Bohr radii.[Calculate/Determine/Use] the Bohr radius.Vocabulary
Collocations
Examples
Examples of “bohr radius” in a Sentence
verb
British English
- This distance bohr-radii the electron's position. (Note: 'Bohr radius' is not used as a verb; this is a non-standard, fabricated example for illustration only.)
American English
- The calculation bohr-radiuses the atomic scale. (Note: 'Bohr radius' is not used as a verb; this is a non-standard, fabricated example for illustration only.)
adverb
British English
- The electron is positioned Bohr-radiusly close. (Note: Extremely rare and non-standard adverbial form.)
American English
- The orbital extends Bohr-radiusly outward. (Note: Extremely rare and non-standard adverbial form.)
adjective
British English
- The Bohr-radius value is fundamental. (Attributive noun usage)
American English
- A Bohr-radius scale diagram. (Attributive noun usage)
Usage
Meaning in Context
Business
Virtually never used.
Academic
Used in textbooks, papers, and lectures on quantum mechanics, atomic physics, and physical chemistry.
Everyday
Not used in everyday conversation.
Technical
Core term in quantum physics and atomic-scale engineering; used in formulas, derivations, and simulations.
Vocabulary
Synonyms of “bohr radius”
Strong
Neutral
Weak
Vocabulary
Antonyms of “bohr radius”
Watch out
Common Mistakes When Using “bohr radius”
- Pronouncing 'Bohr' as 'bore' (UK) or 'bor' (US) is correct, but 'bow-er' is incorrect.
- Using it as a plural without 'radii' (e.g., 'Bohr radiuses').
- Confusing it with the Bohr model in general.
FAQ
Frequently Asked Questions
It is the most probable distance for the electron in the ground state and gives the characteristic scale, but the atom does not have a sharp boundary.
It is the natural scale for hydrogen. For other atoms, effective radii are discussed, often in relation to the Bohr radius.
It was derived by Niels Bohr in his 1913 model of the hydrogen atom.
Yes, it remains a fundamental constant and a convenient natural unit in atomic physics and quantum chemistry.
The most probable distance between the nucleus and the electron in a hydrogen atom in its ground state, a fundamental physical constant of atomic physics.
Bohr radius is usually specialized technical, academic in register.
Bohr radius: in British English it is pronounced /ˈbɔː ˈreɪdɪəs/, and in American English it is pronounced /ˈbɔːr ˈreɪdiəs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Not applicable”
Learning
Memory Aids
Mnemonic
Bohr's 'orbit' radius for the first electron ring in hydrogen is tiny: think of 'Bohr' as 'bore' a very small hole (10⁻¹¹ m).
Conceptual Metaphor
SCALE / RULER (serves as the natural ruler for measuring atomic distances).
Practice
Quiz
What does the Bohr radius represent?