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...eries of the [[Periodic table of elements|periodic table]]. It is weakly [[radioactivity|radioactive]]. It occurs naturally in low concentrations in soil, rock and

...As carbon-14 stops being absorbed when an organism dies. Carbon-14 is a [[radioactivity|radioactive]] [[isotope]] with a [[half-life]] of 5,730 years; its long hal

*1991: ''Radioactivity'' (Single featuring versions not on [[The Mix]])

...uranium ores. All elements from polonium onward are radioactive. The great radioactivity of polonium and its immediate neighbors to the right on the periodic table, ...ies while they were investigating the cause of [[uraninite|pitchblende]] [[radioactivity]]. The pitchblende, after removal of uranium and radium, was more radioacti

'''Leakage of Radioactivity''' There are no penetrations that could leak in the vessel containing the p

...ernatively, it is possible to make a source using material which holds the radioactivity in a chemically resistant and strong form without needing a metal cover. In Image:DiagramofpersonwithcancersecondstageofI131.jpg|'''5''' In time, the radioactivity becomes concentrated in the part of the body that contains the tumor

|event= '''1896:''' [[Henri Becquerel]] discovers [[radioactivity]].

...introduced the technique of [[neutron]] bombardment to study artificial [[radioactivity]], opening the way to the discovery of [[nuclear fission]]. In the 1930s he ...d world-wide renown by their work on the then-new phenomenon of artificial radioactivity obtained by means of neutron bombardment of [[chemical element]]s. Between

{{Image|Radioactive waste decay.png|right|350px|Fig.1 Radioactivity over time of each major isotope in spent fuel from a nuclear reactor <ref>h ...book.com Why Nuclear Power has been a Flop].</ref> Even if we look only at radioactivity released to the environment,<ref>https://www.epa.gov/radtown/radioactive-wa

*[http://www.britannica.com/EBchecked/topic/489089/radioactivity Radioactivity]. (2010). In Encyclopædia Britannica. Retrieved July 12, 2010, from Encycl

* [[Instrumentation for radioactivity]]

...ls such as [[plutonium]] or [[tritium]]; or making materials temporarily [[radioactivity|radioactive]] for procedures such as [[neutron activation analysis]]. Whi

Not all of these methods, such as ultrasonography, use [[radioactivity]]. There are evolving methods that look at heat distribution at the skin su

...ation|sublimed]] into a gas. It consists of both stable [[isotope]]s and [[radioactivity|radioactive]] isotopes. Radioactive iodine has been released in past disast

...The model was originally tested by using measurements of the dispersion of radioactivity caused by the accident in the nuclear power plant of [[Chernobyl disaster|C

...a wide variety of [[hazards]], including [[Nuclear chemistry|nuclear]], [[Radioactivity|radiological]], [[Chemistry|chemical]], [[Biology|biological]], and natural

[[Radioactivity|Radioactive]] labels are injected into the human body. In their decay they

'''Nuclear chemistry''' is a subfield of [[chemistry]] dealing with [[radioactivity]], nuclear processes and nuclear properties. It includes the study of: ...ns further, to isolate a smaller fraction with a higher specific activity (radioactivity per unit mass). In this way, they isolated [[polonium]] and [[radium]].

...lications in quantum mechanics include nucleons in atomic nuclei, or alpha radioactivity where the barrier is not infinite and the particle tunnels through it.

'''Leakage of Radioactivity''' The molten salt fuel is at much lower pressure than a standard Pressuriz