Neutron
/nˈuˌtrɑn/
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Definition
(noun) A subatomic particle forming part of the nucleus of an atom and having no charge; it is a combination of an up quark and two down quarks.
Sentence Examples
Magnetars are a type of neutron star with powerful magnetic fields.
The strong force is responsible for 99% of proton and neutron mass.
CEFR Practice Quiz
The nucleus of an atom contains protons and ____ tied together by strong forces.