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23-May-2017 01:49

This Buzzle article has a list of radioactive elements that abound in nature, arranged in the order of increasing atomic number, along with their decay modes. Radioactivity arrived on the scene of world physics in the 19th century, just when people thought they knew everything in physics.

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Reaching stability involves the process of radioactive decay.

Alpha decay typically occurs in nuclei that are so big that they can’t be stable.

In alpha decay, the nucleus ejects a helium nucleus (alpha particle) composed of two neutrons and two protons, dropping the mass of the original nucleus by four mass units.

Radioactive isotopes are effective tracers because their radioactivity is easy to detect.

A is a substance that can be used to follow the pathway of that substance through some structure.

Sur Terre, il est formé lors de l'absorption de neutrons par les atomes d'azote de la stratosphère et des couches hautes de la troposphère.