Neutron

 Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.

Mass: 1.67492749804(95)×10−27 kg; 939.56542052(54) MeV/c2; 1.00866491588(49) Da

Electric charge: 0 e; (−2±8)×10−22 e (experimental limits)

Interactions: gravity, weak, strong, electromagnetic

Composition: 1 up quark, 2 down quarks

Statistics: fermionic

Classification: baryon

Antiparticle: antineutron


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