15. Calculate the average atomic weight (answer to be given up to 3 decimal places) of Rubidium using the given data. Isotope Abundance (%)| Atomic weight (a.m.u.) 72.17 8Rb 84.912 909 Rb 27.83
Please find solution below..... In denominator it is sum of the abundance which will always add up to 100 .... Here in place of g it will be amu, sorry written in haste..