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free neutron
English Wikipedia - The Free Encyclopedia
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Neutron
The
neutron
is a
subatomic particle
, symbol or , with no net
electric charge
and a
mass
slightly larger than that of a
proton
. Protons and neutrons, each with mass approximately one
atomic mass unit
, constitute the
nucleus
of an
atom
, and they are collectively referred to as
nucleons
. Their properties and interactions are described by
nuclear physics
.
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