Strontium has 4 isotopes: Sr84 with 0.56% abundance and AMU of 3.9134, Sr86 9.86% abundance with AMU of 85.094, Sr87 with AMU of 86.9089, and Sr88 with AMU of 87.9056.  The total average of Strontium is 87.6210. Calculate the abundance of Sr 87 and Sr 88.

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.