Lithium forms compounds which are used in dry cells and storage batteries and in high-temperature lubricants. It has two naturally occurring isotopes, 6Li (isotopic mass = 6.015121 amu) and 7Li (isotopic mass = 7.016003 amu). Lithium has an atomic mass of 6.9409 amu. What is the percent abundance of lithium-6?
(1A)
a) 92.50%
b) 86.66%
c) 46.16%
d) 7.503%
e) 6.080%
Answer: d) 7.503%