radioactivity .

The initial americium samples weighed a few micrograms ; they were barely visible and were identified by their radioactivity.

Elemental astatine has never been viewed, because a mass large enough to be seen ( by the naked human eye ) would be immediately vaporized by the heat generated by its own radioactivity.

Only extremely small quantities are used, however, due to its intense radioactivity.

A visible piece of astatine would be immediately and completely vaporized due to the heat generated by its intense radioactivity.

Analysts can discern the origins of natural and man-made isotopes in the study of environmental radioactivity.

This element of the actinide series was named after Marie Skłodowska-Curie and her husband Pierre Curie-both were known for their research on radioactivity.

She named this behavior radioactivity.

He was awarded the 1938 Nobel Prize in Physics for his work on induced radioactivity.

In 1900 he became a demonstrator in chemistry at McGill University in Montreal, Quebec, where he worked with Ernest Rutherford on radioactivity.

Most of the water in Kazakhstan is polluted by industrial effluents, pesticide and fertilizer residue, and, in some places, radioactivity.

* Lambda indicates the radioactivity decay constant in nuclear physics and radioactivity.

More specific tests for minerals include reaction to acid, magnetism, taste or smell, and radioactivity.

* 1896 – Henri Becquerel discovers radioactivity.

It is very hard to uniquely identify neutrino interactions among the natural background of radioactivity.

File: Enrico Fermi 1943-49. jpg | Enrico Fermi ( 1901-1954 ): developed first nuclear reactor ( Chicago Pile-1 ), contributed to quantum theory, nuclear and particle physics, and statistical mechanics, awarded the 1938 Nobel Prize in Physics for his work on induced radioactivity.

It is also the only gas under normal conditions that only has radioactive isotopes, and is considered a health hazard due to its radioactivity.

She named this behavior radioactivity.

At about the same time as this important discovery, he observed that when " p-particles ", ejected from radio-active substances, impinge upon zinc sulfide, each impact is accompanied by a minute scintillation, an observation which forms the basis of one of the most useful methods in the technique of radioactivity.

Thorium was once commonly used as the light source in gas mantles and as an alloying material, but these applications have declined due to concerns about its radioactivity.

The best known effect of this emission is beta decay, a form of radioactivity.

Due to historic activities typically related to radium industry, uranium mining, and military programs, there are numerous sites that contain or are contaminated with radioactivity.

Most rocks, due to their components, have a certain, but low, level of radioactivity.

* http :// www. oasisllc. com / abgx / radioactivity. htm

An additional 163 are theoretically unstable to known types of decay, but no evidence of decay has ever been observed, for a total of 253 nuclides for which there is no evidence of radioactivity.

Rasetti was one of Fermi's main colloaborators in the study of neutrons and neutron-induced radioactivity.