The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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atomic unit of force
 $E_{\rm h}/a_0$
 Numerical value  8.238 723 5038 x 10-8 N
 Standard uncertainty  0.000 000 0013 x 10-8 N
  Relative standard uncertainty  1.6 x 10-10
 Concise form  8.238 723 5038(13) x 10-8 N    
 
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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