Question

Given the element 3216S
a)Write:
( i)The group of the atom of S.

Answer 1

Answer:

The average atomic mass of a chemical element is calculated by taking into account the atomic masses of its naturally occuring isotopes and their respective abundances.

avg. atomic mass=∑i(isotopei×abundancei)

In your case, the average atomic mass of sulfur will be calculated using the given atomic masses of its four isotopes and their respective decimal abundance, which is simply the percent abundance divided by 100.

So, you know that you have

32S: 31.972 u→95.002% abundance

33S: 32.971 u→0.76% abundance