The neutron is a subatomic particle, symbol
n
or
n0
, with no net electric charge and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms. Since protons and neutrons behave similarly within the nucleus, and each has a mass of approximately one atomic mass unit, they are both referred to as nucleons. Their properties and interactions are described by nuclear physics.
In nuclear physics and nuclear chemistry, nuclear fission is a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into two or more smaller, lighter nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay.
A nuclear reactor, formerly known as an atomic pile, is a device used to initiate and control a self-sustained nuclear chain reaction. Nuclear reactors are used at nuclear power plants for electricity generation and in nuclear marine propulsion. Heat from nuclear fission is passed to a working fluid, which in turn runs through steam turbines. These either drive a ship's propellers or turn electrical generators' shafts. Nuclear generated steam in principle can be used for industrial process heat or for district heating. Some reactors are used to produce isotopes for medical and industrial use, or for production of weapons-grade plutonium. As of early 2019, the IAEA reports there are 454 nuclear power reactors and 226 nuclear research reactors in operation around the world.
Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years. The most common isotopes in natural uranium are uranium-238 and uranium-235. Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.
In nuclear physics, the island of stability is a predicted set of isotopes of superheavy elements that may have considerably longer half-lives than known isotopes of these elements. It is predicted to appear as an "island" in the chart of nuclides, separated from known stable and long-lived primordial radionuclides. Its theoretical existence is attributed to stabilizing effects of predicted "magic numbers" of protons and neutrons in the superheavy mass region.
Artemis Fowl is a series of eight fantasy novels written by Irish author Eoin Colfer, featuring the criminal mastermind Artemis Fowl II. The series has received positive critical reception and generated huge sales. It has also originated graphic novel adaptations.
Artemis Fowl: The Eternity Code is the third book of Irish children's fiction author Eoin Colfer's Artemis Fowl series. It is preceded by Artemis Fowl: The Arctic Incident and followed by Artemis Fowl: The Opal Deception. The storyline follows Artemis Fowl and his companions as they struggle to recover the "C Cube", a supercomputer Artemis had constructed from fairy technology, when Jon Spiro manages to steal it. Critical response was generally favourable.
Radiological warfare is any form of warfare involving deliberate radiation poisoning or contamination of an area with radiological sources.
Captain Holly Short is a character of the Artemis Fowl novel series by Eoin Colfer.
Nuclear fission products are the atomic fragments left after a large atomic nucleus undergoes nuclear fission. Typically, a large nucleus like that of uranium fissions by splitting into two smaller nuclei, along with a few neutrons, the release of heat energy, and gamma rays. The two smaller nuclei are the fission products..
Foaly is a fictional character in the Artemis Fowl series by Eoin Colfer. He is the technical consultant to the Lower Elements Police (LEP). He is the most intelligent centaur on and under the Earth, considers himself to be an unappreciated genius, and is the inventor of most of the advanced technology possessed by the fairy world, rivaled only by commercial tech giant and former classmate Opal Koboi.
Mystic Knights of Tir Na Nog is an Irish/American fantasy-adventure television series set in a fantasy version of ancient Ireland, created by Saban Entertainment. It was loosely based on actual Irish mythology. The name is derived from Tír na nÓg, one of the Otherworlds of Irish mythology. It was Saban's first fantasy series to involve knights, dragons, and wizards. It aired on the Fox Kids block on Fox from September 12, 1998 and ending on May 7, 1999. A second season entitled Mystic Knights: Battle Thunder was planned, but was later cancelled, and its budget was put towards Power Rangers Lost Galaxy. The resulting series was an attempt in doing an original non-Japanese special-effects series rather than adapting from actual Japanese tokusatsu.
Spiro Mounds is a major Northern Caddoan Mississippian archaeological site located in present-day Eastern Oklahoma. The 80-acre site lies near the Arkansas River, seven miles north of the town of Spiro.
Rider Chips are a Japanese hard rock band started in 2000 on the Avex Mode label. Originally, it consisted of only three instrumentalists who invited different vocalists periodically. But in 2006, Ricky joined the group full-time as vocalist.
Melford Elliot "Mel" Spiro was an American cultural anthropologist specializing in religion and psychological anthropology. He is known for his critiques of the pillars of contemporary anthropological theory—wholesale cultural determinism, radical cultural relativism, and virtually limitless cultural diversity—and for his emphasis on the theoretical importance of unconscious desires and beliefs in the study of stability and change in social and cultural systems, particularly in respect to the family, politics, and religion. Explicated in numerous theoretical publications, they are empirically exemplified in monographs based on his fieldwork in Ifaluk atoll in Micronesia, an Israeli kibbutz, and a village in Burma.
Plutonium is a radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, silicon, and hydrogen. When exposed to moist air, it forms oxides and hydrides that can expand the sample up to 70% in volume, which in turn flake off as a powder that is pyrophoric. It is radioactive and can accumulate in bones, which makes the handling of plutonium dangerous.
A goblin is a monstrous creature from European folklore, first attested in stories from the Middle Ages. They are ascribed various and conflicting abilities, temperaments and appearances depending on the story and country of origin. They are almost always small and grotesque, mischievous or outright malicious, and greedy, especially for gold and jewelry. They often have magical abilities similar to a fairy or demon. Similar creatures include brownies, dwarfs, duendes, gnomes, imps, and kobolds.
Unbiquadium, also known as element 124 or eka-uranium, is the hypothetical chemical element with atomic number 124 and placeholder symbol Ubq. Unbiquadium and Ubq are the temporary IUPAC name and symbol, respectively, until the element is discovered, confirmed, and a permanent name is decided upon. In the periodic table, unbiquadium is expected to be a g-block superactinide and the sixth element in the 8th period. Unbiquadium has attracted attention, as it may lie within the island of stability, leading to longer half-lives, especially for 308Ubq which is predicted to have a magic number of neutrons (184).
