2 syllables: neu, tron. Stress on neu.
NOO-trahn
/ˈnuˌtɹɑn/
neutron is pronounced NOO-trahn (/ˈnuˌtɹɑn/). It has two syllables (neu-tron), with the stress on "neu". Neutron is a subatomic particle with no electric charge, located in the nucleus of an atom alongside protons. It has a small, nearly equal mass to the proton and plays a key role in atomic stability and nuclear reactions. The term is used in physics, chemistry, and related sciences to describe neutral particles that contribute to isotopic mass and nuclear properties.
Neutron is a subatomic particle with no electric charge, located in the nucleus of an atom alongside protons. It has a small, nearly equal mass to the proton and plays a key role in atomic stability and nuclear reactions. The term is used in physics, chemistry, and related sciences to describe neutral particles that contribute to isotopic mass and nuclear properties.
"The neutron was discovered by James Chadwick in 1932, confirming the existence of neutral nucleons."
"In a reactor, neutrons propagate and induce fission in fissile materials."
"Some isotopes are unstable because they contain too many or too few neutrons."
Neutron is pronounced NEW-tron, with stress on the first syllable. IPA US: /ˈnuː.trɒn/, UK/AU: /ˈnjuː.trɒn/. Begin with a rounded, long /uː/ vowel, then a light schwa-like or reduced mid vowel in the second syllable before a clear /n/. The first syllable contains a yod-like onset in some accents: /nj/ in UK/US connected speech. Keep the /t/ as the standard alveolar stop, not a flap. You’ll hear a crisp, short /n/ at the end. Audio example references: Cambridge/Forvo pronunciations. Keywords: NEU-tron, stressed first syllable, long /uː/ then /trɒn/.
Common errors: (1) Slurring the /t/ into /d/ making /ˈnuː.drɒn/; pause the /t/ clearly between ‘neu’ and ‘tron’. (2) Reducing the first vowel to a short /ɪ/ or /ə/; keep a long /uː/ as in 'new'. (3) Merging /tr/ cluster too loosely, producing /ˈnjuːɹɒn/ or /ˈnuːrɒn/. Corrections: practice with minimal pairs to separate /uː/ from /r/; rehearse /tr/ as a sharp, two-phoneme onset, then blend. Ipa cues: NEU- /ˈnuː/ and -tron /trɒn/.
In US: final /ɒ/ as in 'not' with r-colored quality often reduced in careful speech. In UK: /ˈnjuː.trɒn/ with a clearer /ɒ/ vowel and non-rhoticity typically; the /r/ is not pronounced unless followed by a vowel. In Australian: similar to UK, with non-rhotic tendencies and a slightly broader /ɔː/ sometimes realized as /ɒ/; the initial /nj/ onset can be more palatalized. Core is the stressed /ˈnjuː/ or /ˈnuː/ followed by /trɒn/. Use IPA for precision and listen to region-specific dictionaries.
Because it combines a long tense vowel in the first syllable /ˈnuː/ or /ˈnjuː/ with a fast, precise /tr/ cluster and final /n/. The /tr/ cluster can blur in rapid speech, and non-rhotic accents may reduce the /r/ influence, changing timing. The first syllable can trigger lip rounding and tongue height shifts, requiring careful coordination to avoid conflating /nuː/ with /nu/ or /njuː/ variants. Focus on a crisp /t/ and stable /n/ endings.
Unlike many two-syllable words, neutron keeps a prominent long vowel in the first syllable and a compact, staccato onset for the second syllable; you’ll want to maintain a clear boundary between /ˈnuː/ and /trɒn/. Also, the /tr/ cluster is coarticulated with the following /ɒ/. Practicing with minimal pairs that isolate the /uː/ vowel helps stability: /ˈnuː.trɒn/ vs /ˈnjuː.trɒn/.
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The word neutron comes from the English prefix neo- (neutral, new) and the particle-denoting -tron from Greek root -tron meaning instrument or thing. The term was coined in the early 1930s after laboratory experiments demonstrated a neutral nucleon inside the atomic nucleus.F. W. Aston and James Chadwick’s contemporary work in the 1930s solidified the concept of a neutrally charged constituent of the nucleus, distinct from protons. First used in scientific literature circa 1932, the term quickly became standard in physics and chemistry as the foundational understanding of atomic structure matured. The etymology reflects a logical extension of existing vocabulary for charged particles (electron, proton) to describe their neutral counterpart. Over time, “neutron” is now ubiquitous in nuclear physics, materials science, and cosmology, with the same root implying neutrality and the -tron suffix signaling a subatomic particle. The wording also harmonizes with other particle names that use -tron or -on suffixes to denote fundamental particles in physics.
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Words that rhyme with "neutron"
-ton sounds
Practice with these rhyming pairs to improve your pronunciation consistency:
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