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neutron-proton mass ratio
Numerical value
1.001 378 419 31
Standard uncertainty
0.000 000 000 49
Relative standard uncertainty
4.9 x 10
-10
Concise form
1.001 378 419 31(49)
Click
here
for
correlation coefficient
of this constant with other constants
Source: 2018 CODATA
recommended values
Definition of
uncertainty
Correlation coefficient with
any other constant