Atomic mass constant

In physics and chemistry, the atomic mass constant, m_u, is one twelfth of the mass of an unbound atom of carbon-12 at rest and in its ground state. It serves to define the atomic mass unit and is, by definition, equal to 1 u. The 2010 CODATA recommended value is 6973166053892099999♠1.660538921(73)×10 kg .

单词	Atomic mass constant
释义	Atomic mass constant 英语百科 Atomic mass constant In physics and chemistry, the atomic mass constant, m_u, is one twelfth of the mass of an unbound atom of carbon-12 at rest and in its ground state. It serves to define the atomic mass unit and is, by definition, equal to 1 u. The 2010 CODATA recommended value is 6973166053892099999♠1.660538921(73)×10 kg .
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