RADIOACTIVITY.EU.COM

icon THE PHENOMENON
THE PHENOMENON
icon IN DAILY LIFE
IN DAILY LIFE
icon QUESTION OF DOSES
QUESTION OF DOSES
icon AT THE DOCTOR’S
AT THE DOCTOR’S
icon At the laboratory
At the laboratory
icon At the museum
At the museum
icon NUCLEAR ENERGY
NUCLEAR ENERGY
icon RADIOACTIVE WASTE
RADIOACTIVE WASTE

The aim of this web site is to explain radioactivity and its applications to the general public.

Uranium is the heaviest naturally occurring chemical element. All of its isotopes are radioactive, and it would have disappeared from our environment if two of these isotopes, uranium-238 and uranium-235, did not have a life span comparable to the age of the solar system.

Uranium-238 and uranium-235, along with their daughter isotopes, are the source of some of the radioactivity to which we are exposed. Uranium-235 is the only natural nucleus that is easily fissile. It is highly sought after, but it is rare, since natural uranium is 99.3% isotope 238 and only 0.70% isotope 235. After enrichment, uranium-235 is used as fuel in nuclear reactors and as an explosive in atomic bombs.

Similar definition(s) :

Plutonium

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