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%I #23 Nov 26 2023 08:37:15
%S 1,6,6,0,5,3,9,0,6
%N Decimal expansion of atomic mass constant, in kg.
%C From _Jianing Song_, Nov 26 2023: (Start)
%C The atomic mass constant (with symbol Da or u) is defined as 1/12 of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest.
%C We have 1.66053906610*10^(-27) kg <= 1 u <= 1.66053906710*10^(-27) kg. Multiplying this by the Avogadro constant (A322578) we get 0.0009999999993533... kg/mol <= (1 u)*N_A <= 0.0009999999999555... kg/mol. In other words, 1 u is strictly less than (but very close to) (0.001 kg/mol)/N_A after the redefinition of SI units in 2019. (End)
%H NIST, <a href="https://physics.nist.gov/cgi-bin/cuu/Value?u">CODATA Value: atomic mass constant</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Atomic_mass_constant">Atomic mass constant</a>
%Y Cf. A081813 (atomic mass constant in MeV/c^2).
%K cons,nonn
%O -26,2
%A _Benoit Cloitre_, Apr 10 2003
%E Updated by _Ivan Panchenko_, Sep 11 2014
%E Updated from CODATA by _Andrey Zabolotskiy_, Jan 21 2021
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