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What is the atomic mass of lithium?

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Stylized lithium-7 atom: 3 protons, 4 neutrons, & 3 electrons (total electrons are ~​1⁄4300th of the mass of the nucleus). It has a mass of 7.016 u. Rare lithium-6 (mass of 6.015 u) has only 3 neutrons, reducing the atomic weight (average) of lithium to 6.941. read more

The atomic mass (m a) is the mass of an atom. Its unit is the unified atomic mass units (symbol: u, or Da) where 1 unified atomic mass unit is defined as 1 ⁄ 12 of the mass of a single carbon-12 atom, at rest. read more

The stockpiled lithium was depleted in lithium-6 by 75%, which was enough to affect the measured atomic weight of lithium in many standardized chemicals, and even the atomic weight of lithium in some "natural sources" of lithium ion which had been "contaminated" by lithium salts discharged from isotope separation facilities, which had found its way into ground water. read more

Is this the right place to ask this question. You can easily search the answer of this question on google instead of posting on quora. By the way Atomic mass of lithium is 6.941 u ± 0.002 u read more

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