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Published online by Cambridge University Press: 27 August 2025
There are many—not just one—periodic laws in chemistry. These laws correspond to nonaccidental regularity relations about physical and chemical properties of (sets of) chemical elements. I support this by showing how these regularity relations can be understood from the perspective of a philosophical analysis of laws. Specifically, I show that these relations instantiate standard features associated with laws; they can be spelled out in terms of two standard accounts of laws; and they can coherently figure in debates about the reality of laws as plausible candidates of ceteris paribus laws.