Question

Calculate the average atomic mass of lithium, which occurs as two isotopes that have the following mass numbers 6 and 7 with respective abundances in nature 7.59 %and 92.41 %​

Answer 1

Answer:

6.9241 amu

Explanation :

Average atomic mass =

= 6*7.59 + 7*92.4 /100

= 45.54 +646.87 /100

= 692.41 /100

= 6.9241