: an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
Examples of neutron in a Sentence
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However, the nuclei of some atoms of hydrogen feature one proton and one neutron, too.
—
Keith Cooper, Space.com, 17 Oct. 2025
And that each electron is tiny in mass compared to each proton, neutrons, and atomic nucleus.
—Big Think, 16 Oct. 2025
Atoms of the same element with different numbers of neutrons are called isotopes.
—Kelling Donald, The Conversation, 13 Oct. 2025
Ruotsalainen observed that the atomic nuclei, which consist of electrically positive protons and electrically neutral neutrons, moved in circular paths inside the trap, under a powerful magnetic field.
—Georgina Jedikovska, Interesting Engineering, 8 Oct. 2025
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Keith Cooper, Space.com, 17 Oct. 2025
And that each electron is tiny in mass compared to each proton, neutrons, and atomic nucleus.
—Big Think, 16 Oct. 2025
Atoms of the same element with different numbers of neutrons are called isotopes.
—Kelling Donald, The Conversation, 13 Oct. 2025
Ruotsalainen observed that the atomic nuclei, which consist of electrically positive protons and electrically neutral neutrons, moved in circular paths inside the trap, under a powerful magnetic field.
—Georgina Jedikovska, Interesting Engineering, 8 Oct. 2025
See All Example Sentences for neutron
Cite this Entry
“Neutron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neutron. Accessed 20 Oct. 2025.
Copy CitationKids Definition
neutron
noun
neu·tron
ˈn(y)ü-ˌträn 
: an uncharged atomic particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
Medical Definition
neutron
noun
neu·tron
ˈn(y)ü-ˌträn
: an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
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