Chemistry, 10.07.2019 13:00 gevaughn600

What observations led to the periodic law? what observations led to the periodic law? observation that certain elements possess such property as radioactivity observation that the all halogen elements have similar properties observation that the all metals have similar properties observation that the properties of elements recur and certain elements have similar properties?

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What observations led to the periodic law? what observations led to the periodic law? observation...