What happens if I'm exposed to radioactive material?

Radioactivity—which describes the energetic disintegration of atoms—is a constant presence in our lives. There are radioactive gases in the air we breathe, and even our own bodies contain naturally occurring radioactive ...

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In chemistry, a metal (Greek: Metallo, Μέταλλο) is an element, compound, or alloy characterized by high electrical conductivity. In a metal, atoms readily lose electrons to form positive ions (cations); those ions are surrounded by delocalized electrons, which are responsible for the conductivity. The thus produced solid is held by electrostatic interactions between the ions and the electron cloud, which are called metallic bonds.

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