Which of the following is not a chemical element?
iridium
limestone
tungsten
tin
Iridium, tungsten and tin are chemical elements. Limestone is a common sedimentary rock composed mainly of skeletal fragments of marine organisms.
reach: rather globalchemical elementschemistry
Answers by country
iridium
limestone
tungsten
tin
answers
France16
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the United Kingdom208
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Germany228
Unknown47
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