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Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above. The NUBASE2020 evaluation of nuclear physics properties F.G. Kondev et al. 2021 Chinese Phys. C 45 030001. The PDF of this article lists the half-lives of all known radioactives nuclides.
Characters of the Half-Life series#Wallace Breen From a fictional character : This is a redirect from a fictional character to a related fictional work or list of characters. The destination may be an article about a related fictional work that mentions this character, a standalone list of characters, or a subsection of an article or list.
Alyx Vance (voiced by Merle Dandridge in Half-Life 2 and its episodes and by Ozioma Akagha in the prequel Half-Life: Alyx [8]) is a prominent figure in the human resistance against the rule of the Combine over Earth and their human representative, Dr. Wallace Breen. Alyx is the daughter of Dr. Eli Vance and his deceased wife Azian, and she ...
Depiction of the Combine's Civil Protection. Certain elements of the Combine's appearance, such as that of the Advisors, are inspired by the works of Frank Herbert. [1] The towering Striders seen throughout Half-Life 2 and its subsequent episodes are based directly on the Martian tripods of the H. G. Wells novel The War of the Worlds, where Martians invade Victorian England, using the tripods ...
Of the 94 natural elements, eighty have a stable isotope and one more has an almost-stable isotope (with a half-life of 2.01×10 19 years, over a billion times the age of the universe). [15] [b] Two more, thorium and uranium, have isotopes undergoing radioactive decay with a half-life comparable to the age of the Earth.
Rutherford applied the principle of a radioactive element's half-life in studies of age determination of rocks by measuring the decay period of radium to lead-206. Half-life is constant over the lifetime of an exponentially decaying quantity, and it is a characteristic unit for the exponential decay equation. The accompanying table shows the ...
WASHINGTON (Reuters) - Rock and dust samples retrieved by NASA from the asteroid Bennu exhibit some of the chemical building blocks of life, according to research that provides some of the best ...
Dr. Wallace Breen: City 17: Half-Life 2: Former administration of Black Mesa Research Facility, Dr. Breen is the appointed chancellor of City 17, while Earth is ruled by the Combine and serves as the main antagonist of Half-Life 2. Breen is presumed dead after failing to escape the planet. [37] Scolar Visari: Helghan Empire: The Helghast: Killzone