Constants
Topics:
Values
Energy
Equivalents
Searchable
Bibliography
Background
Constants
Bibliography
Constants,
Units &
Uncertainty
home page
proton-neutron mass ratio
Numerical value
0.998 623 478 12
Standard uncertainty
0.000 000 000 49
Relative standard uncertainty
4.9 x 10
-10
Concise form
0.998 623 478 12(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