Isotopes of strontium

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The alkaline earth metal strontium (38Sr) has four stable, naturally occurring isotopes: 84Sr (0.56%), 86Sr (9.86%), 87Sr (7.0%) and 88Sr (82.58%), giving it a standard atomic weight of 87.62.

Excerpt from the Wikipedia article “Isotopes of strontium”, under the CC BY-SA 4.0 license. Read the article on Wikipedia