Silicon has three naturally occurring isotopes: (27.9769 u), (28.9765 u)

CHEMISTRY · Subjective · A Level · Chemistry · Atomic structure · Atomic structure

Problem

Silicon has three naturally occurring isotopes:

^{28}\text{Si}

(27.9769 u),

^{29}\text{Si}

(28.9765 u), and

^{30}\text{Si}

(29.9738 u). Given that

^{28}\text{Si}

accounts for 92.23 % of all silicon atoms and the average atomic mass of silicon is 28.09 u, determine the percent abundances of

^{29}\text{Si}

and

^{30}\text{Si}

. Report each value to two decimal places.