Atomic and nuclear properties of the neutron (n):
QuantityValueUnitsValueUnits
Atomic number 0 n n n
Mass +/- 1.008 664 916 00 (43) u +/- 939.565 379 (21) MeV
Nuclear density mmmfew x 1015 g cm-3 n n
Mass values from 2010 CODATA
Mean life 880.0 ± 0.9 s (RPP2014; error includes scale factor of 1.8)