Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

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The orderly periodic table—often printed with just the chemical symbol and atomic weight of its 118 elements—doesn't quite manage to convey to nonscientists the richness of what these substances bring ...

The periodic table captures a subtle pattern that runs through the chemical elements, the fundamental building blocks of everything around us: from the aluminium in bike frames to the xenon gas in ...