An atom consists of a heavy center, called the nucleus, made of particles called protons and neutrons. An atom has lighter ...

A molecule of pure water is made of two hydrogen atoms bonded to an oxygen atom. As explained in a previous Curious Kids article, scientists think the water on Earth may have come from the melting ...

Created by chemistry set maker Thames & Kosmos along with Pittsburgh-based Schell Games, Happy Atoms teaches kids about building molecules using magnetic atoms that connect in “happy” ways.

But many kids only learn about them through an abstract form: the periodic table. One renowned game designer, Jesse Schell, is aiming to bring these elements to life with a toy-and app combo that lets ...