Noble Gases: “Monoatomic Substances” or “Monoatomic Molecular Substances”?
Abstract Recently, views are rising among some teachers that noble gases should be understood as “existing in the form of monoatomic molecules\’\’ instead of just “separate atoms”. Undoubtedly, this has made students confused when trying to understand the properties of noble gases. To evaluate the two notions, this article first reviews historical discussions around …
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