Answer to Question #222979 in Inorganic Chemistry for Hanna

Question

Lithium atom has two naturally occuring isotopes 26Li and 27Li. Given that the relative molecular mass of Lithium is 6.94. What is the abundance of these isotopes?

Answer 1

average atomic mass = (26 + 27)/2

= 26.5

26.5% = x + (1-x)

26.5 × 3.47 = 91.955

91.955 = 2x

X = 45.978