How to Find the Mass of One Atom of Lithium (Li)

There are two steps to find the mass of the Lithium (Li) atom. First we find the atomic mass of Li from the Periodic Table. We then divide this by Avogadro's Number (6.02 x E23).

Note that this is the mass of an average atom of Lithium since the periodic table lists the average atomic mass for elements. If you were given a specific isotope of Lithium you would divide the mass number for the isotope by Avogadro's number.

You should check your answer to make sure it makes sense. Since atoms are very, very small you should get a very small number as your answer.

Note that this is the mass for a single atom of Lithium (Li). In reality electronic balances are not able to measure the mass of one single atom at a time due to their small size.

For help with molar mass and chemical quantities, the following videos may be helpful:

[liu]

Did you key in the wrong values in your calculator? Please check! Answer should be close to 1.15 x 10^-23 g

[OrtizPatricia-yt]

you're calculations are incredibly incorrect for Li-6 it should be closer to 6.015 not anywhere near 9.

[nurlatifahmohdnor]

ti-ba = arrive




[ti-ba]2 = suddenly or in no time







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[rssl]

Roughly 7amu or approximately 11.62 x 10^-24 grams