Question

If the average atomic mass of Rhodium is 102.91 amu, which isotope do you think has the greater percent abundance?

Answer 1

round up given mass to a whole number

$\\ \sf\longmapsto 102.91$

$\\ \sf\longmapsto 102.9$

$\\ \sf\longmapsto 103$

Hence our answer is Rhodium-103