Neutron Mass - CODATA Value

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Fundamental Physical Constants

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neutron mass $m_{\rm n}$
Numerical value 1.674 927 500 56 x 10-27 kg
Standard uncertainty 0.000 000 000 85 x 10-27 kg
Relative standard uncertainty 5.1 x 10-10
Concise form 1.674 927 500 56(85) x 10-27 kg
Click here for correlation coefficient of this constant with other constants
Source: 2022 CODATA recommended values Definition of uncertainty Correlation coefficient with any other constant
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