Element Y has two natural isotopes: Y-63 (62.940 amu)and Y-65 (64.928 amu).Calculate the atomic mass of element Y given the abundance of Y-63 is 69.17%.

Question

Quizplus · Accepted Answer

To calculate the atomic mass of Y, we need to take into account the proportions and masses of both isotopes. We can use the following equation:

atomic mass of Y = (mass of Y-63 x abundance of Y-63) + (mass of Y-65 x abundance of Y-65)

Substituting values, we get:

atomic mass of Y = (62.940 amu x 0.6917) + (64.928 amu x 0.3083)
atomic mass of Y = 43.503948 amu + 20.013324 amu
atomic mass of Y = 63.517272 amu

Therefore, the atomic mass of element Y is 63.55 amu.

Element Y Has Two Natural Isotopes: Y-63 (62