What is the average atomic mass of lithium?

Answer 1

The major isotopes of lithium are (i) #""^7Li#, and (ii) #""^6Li#. The weighted average of these isotopes is #6.941# #g*mol^-1#.

You will have to look up the isotopic distribution of lithium nuclei. ALL lithium nuclei have 3 positively charged nuclear particles, protons, i.e. #Z# #=# #3#. These 3 particles give rise to the element's identity. If you take the weighted average of ALL lithium nuclei, we get an average mass of #6.941# #g*mol^-1#.

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Answer 2

Serenity Allen

The average atomic mass of lithium is approximately 6.94 atomic mass units (amu).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.