Assertion: magnesium sulfate's sulfur | /r/HasAspect | 23 known isotopes
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text: Sulfur has 23 known isotopes, four of which are stable: 32S (94.99%±0.26%), 33S (0.75%±0.02%), 34S (4.25%±0.24%), and 36S (0.01%±0.01%).