Silicon has three naturally occurring isotopes: 92.23% of 28Si, with an atomic weight of 27.9769 amu; 4.68% of 29Si, with an atomic weight of 28.9765 amu; and 3.09% of 30Si, with an atomic weight of 29.9738 amu. On the basis of these data, confirm that the average atomic weight of Si is 28.0854 amu.
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