alpha particle: meaning, definition, pronunciation and examples
C2technical, scientific
Quick answer
What does “alpha particle” mean?
A type of subatomic particle consisting of two protons and two neutrons, identical to a helium-4 nucleus.
Audio
Pronunciation
Definition
Meaning and Definition
A type of subatomic particle consisting of two protons and two neutrons, identical to a helium-4 nucleus.
A positively charged particle emitted from the nucleus of some radioactive elements during radioactive decay; the least penetrating form of common nuclear radiation.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or meaning differences. Pronunciation differences are minor (see IPA).
Connotations
Identical. Technical term with no cultural or connotative variation.
Frequency
Used with identical frequency in scientific and technical contexts in both regions. Virtually never used in everyday language.
Grammar
How to Use “alpha particle” in a Sentence
The [radioactive element] emits an alpha particle.An alpha particle [verb: is emitted, penetrates, is absorbed].[Subject: Alpha particles] have [property: low penetration, high charge].Vocabulary
Collocations
Examples
Examples of “alpha particle” in a Sentence
adjective
British English
- alpha-particle-emitting material
American English
- alpha-particle-emitting material
Usage
Meaning in Context
Academic
Used in physics, chemistry, nuclear engineering, and environmental science courses and research.
Everyday
Only encountered in news reports about nuclear accidents, radiation therapy, or scientific documentaries.
Technical
Core term in nuclear physics, radiation safety, and materials science.
Vocabulary
Synonyms of “alpha particle”
Vocabulary
Antonyms of “alpha particle”
Watch out
Common Mistakes When Using “alpha particle”
- Confusing alpha particles with beta or gamma radiation.
- Thinking they are highly penetrating (they are the least penetrating).
- Using 'alpha particle' to refer to any small, fundamental particle.
FAQ
Frequently Asked Questions
Yes, but primarily if inhaled or ingested. Externally, they are stopped by skin or paper, but internally they can cause significant cell damage.
It was the first type of radiation from radioactive materials to be discovered and classified by Ernest Rutherford, who labeled them with the first letter of the Greek alphabet.
It has a charge of +2, as it contains two protons and no electrons.
No, they are subatomic and invisible. Their presence and effects are detected using specialized equipment like Geiger counters or cloud chambers.
A type of subatomic particle consisting of two protons and two neutrons, identical to a helium-4 nucleus.
Alpha particle is usually technical, scientific in register.
Alpha particle: in British English it is pronounced /ˈælfə ˌpɑːtɪkl̩/, and in American English it is pronounced /ˈælfə ˌpɑːrtɪkl̩/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think 'Alphabet: A is for Alpha' – the first, heaviest common radioactive particle (A for first, heavy like an 'A' block).
Conceptual Metaphor
A BULLET: Alpha particles are often metaphorically described as projectiles that can be fired, stopped, or deflected.
Practice
Quiz
What is the primary component of an alpha particle?