The astronaut then measures the abundance of silicon on the new planet, obtaining the following results:
Isotope Abundance
(%) Mass
(amu)
28Si 73.71 27.98
29Si
14.93 28.98
30Si 11.36 29.97
What is the atomic mass of silicon for this planet?
To calculate the average mass of the element, we take the summation of the product of the isotope mass and the percent abundance.In this case, it becomes 28*0.7371 + 29*0.1493 + 30 *0.1136. This is equal to 28.376 g/mol.
