Question

Part A
What statement best describes the atomic weight of an element?
View Available Hint(s)
What statement best describes the atomic weight of an element?
Atomic weight is the sum of the masses of the isotopes.
Atomic weight is the product of the relative abundances masses.
Atomic weight is the sum of the masses of the isotopes multiplied by their relative abundances.
Atomic weight is the masses of the isotopes less their relative abundances.

Answer 1

Atomic weight is the sum of the masses of the isotopes multiplied by their relative abundances.

For example atomic weight of Chlorin:

Isotopes atomic mass	percent abundance
34.96885	75.78 %
36.96590	24.22 %

Atomic weight of chlorin isotopes will be,

34.96885 x 0.7578 = 26.50

36.96590 x 0.2422 = 8.95

26.50 + 8.95 = 35.45

The atomic weight of chlorine is 35.45 amu.