We have to determine which of the two isotopes of lithium has the mass closest to its average atomic mass.
The percentage by which an isotope of an element occurs with other isotopes of the same element, is called natural abundance.
We have the following data:
Lithium has two naturally occurring isotopes: Li-6 (natural abundance 7.5%; mass 6.0151 amu) and Li-7 (natural abundance 92.5%; mass 7.0160 amu).
Without doing any calculations, determine which mass is closest to the atomic mass of Li.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Isotopes concept. You can view video lessons to learn Isotopes. Or if you need more Isotopes practice, you can also practice Isotopes practice problems.