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electron relative atomic mass  Numerical value  5.485 799 090 65 x 10-4  Standard uncertainty  0.000 000 000 16 x 10-4   Relative standard uncertainty  2.9 x 10-11  Concise form  5.485 799 090 65(16) x 10-4       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