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- Acute radiation syndrome [r]: Disease or death caused by whole-body irradiation, over a short period of time, with a significant quantity of penetrating radiation [e]
- Alpha particle [r]: helium nucleus; particle of charge 2e and mass 4 u. [e]
- Argon [r]: A chemical element with atomic number 18. It is an inert gas in group 18 of the modern periodic table. [e]
- Arsenic [r]: A chemical element, having the chemical symbol As, and atomic number (the number of protons) 33. [e]
- Astatine [r]: A radioactive chemical element with atomic number Z=85. [e]
- Atom (science) [r]: The defining unit of chemical elements. [e]
- Atomic mass [r]: The mass of an atom expressed in unified atomic mass units (u) and formerly known as atomic weight. [e]
- Atomic number [r]: The number of protons in the nucleus of a single atom of a chemical element. [e]
- Avogadro's number [r]: The number of atoms in 12 gram of carbon-12 atoms in their ground state at rest. [e]
- Beryllium [r]: A chemical element, having the chemical symbol Be, and atomic number (the number of protons) 4. [e]
- Bromine [r]: A chemical element, having the chemical symbol Br, and atomic number (the number of protons) 35. [e]
- Cadmium [r]: A chemical element with the symbol Cd and atomic number 48. [e]
- Carbon [r]: Fourth most abundant chemical element in the Universe, with atomic number Z=6. [e]
- Chemical elements [r]: Chemical elements, in one sense of the term, refers to species or types of atoms and, in another sense of the term, refers to chemical pure substances each composed of atoms solely of a single species or type. [e]
- Chemistry [r]: The science of matter, or of the electrical or electrostatical interactions of matter. [e]
- Cobalt [r]: A hard, lustrous, grey metal, a chemical element with symbol Co and atomic number 27. [e]
- Deuterium [r]: An isotope of the chemical element hydrogen containing one proton and one neutron. [e]
- Edward Teller [r]: (January 15, 1908 - September 9, 2003) One of the most controversial scientists of the 20th century because of his role as the main developer of the hydrogen bomb, his outspoken defense of an unassailable nuclear arsenal, and support for President Reagan's Strategic Defensive Initiative. [e]
- Electromagnetic wave [r]: a change, periodic in space and time, of an electric field E(r,t) and a magnetic field B(r,t); a stream of electromagnetic waves, referred to as electromagnetic radiation, can be seen as a stream of massless elementary particles, named photons. [e]
- Evolution of the human diet [r]: Factors in the development of the human diet in history. [e]
- Fission device [r]: An assembly of components, not necessarily in a form usable as a weapon, which will produce a large energy release through nuclear fission [e]
- Fusion device [r]: An explosive device, whether used as a weapon or for other purposes, which depends for most of its explosive power on the release of energy by combining atomic nuclei [e]
- Gallium [r]: A chemical element, having the chemical symbol Ga, and atomic number (the number of protons) 31. [e]
- Geochronometry [r]: A branch of stratigraphy and of geochronology aimed at the quantitative measurement of geologic time. [e]
- Geologic ages of earth history [r]: Measurement of the geologic history of the earth which can be broadly classified into two periods: the Precambrian supereon and the Phanerozoic eon. [e]
- Germanium [r]: A chemical element, having the chemical symbol Ge, and atomic number (the number of protons) 32. [e]
- Gold [r]: Chemical element 79, a lustrous corrosion-resistant precious metal used for money, electronics and jewelry. [e]
- Hydrogen [r]: The most abundant and lightest chemical element which has atomic number Z = 1 and chemical symbol H. [e]
- Iridium [r]: A very hard, brittle, silvery-white transition metal and chemical element with atomic number 77, and is represented by the symbol Ir. [e]
- Iron [r]: An important transition metal and chemical element with the symbol Fe (Latin: ferrum) and atomic number 26. [e]
- Krypton [r]: A chemical element, having the chemical symbol Li, and atomic number (the number of protons) 3. [e]
- LITTLE BOY (nuclear weapon) [r]: Code name for the first nuclear weapon used in warfare, dropped on Hiroshima, Japan, on August 6, 1945. [e]
- Lead [r]: Chemical element number 82, a corrosion-resistant, dense, ductile heavy metal known to cause neurological problems. [e]
- Magnesium [r]: The metallic element that has atomic number 12 and belongs to alkaline earth metal group. [e]
- Magnetic resonance imaging [r]: The use of magnetic fields and electromagnetic radiation to visualize internal structures of non-magnetic objects non-destructively. [e]
- Manganese [r]: A chemical element, having the chemical symbol Mn, and atomic number (the number of protons) 25. [e]
- Molecule [r]: An aggregate of two or more atoms in a definite arrangement held together by chemical bonds. [e]
- Molybdenum [r]: A chemical element, having the chemical symbol Mo, and atomic number (the number of protons) 42. [e]
- NMR spectroscopy [r]: The use of electromagnetic radiation, in the presence of a magnetic field, to obtain information regarding transitions between different nuclear spin states of the nuclei present in the sample of interest. [e]
- Neutron [r]: An elementary particle of neutral charge, normally found in the nucleus of chemical elements, but having significant effects when in free flight; the number of neutrons in the nucleus of an element defines its identity as an isotope [e]
- Nitrogen [r]: a chemical element, symbolized by N, whose individual atoms comprise a nucleus of seven protons, i.e,., it has an atomic number, Z = 7. [e]
- Nuclear chemistry [r]: Subfield of chemistry dealing with radioactivity, nuclear processes and nuclear properties. [e]
- Nuclear fission [r]: The process by which a suitable isotope of an element with a higher atomic number absorbs a neutron, producing two or more lower-numbered nuclei and a large release of energy [e]
- Nuclear fuel cycle [r]: The progression of nuclear fuel through a series of differing stages, also called the nuclear fuel chain. [e]
- Nuclear fuel [r]: Material that can be consumed to derive nuclear energy, usually heavy fissile elements that can be made to undergo nuclear fission chain reactions in a nuclear fission reactor. [e]
- Oxidative stress [r]: An imbalance between the production of reactive oxygen and a biological system's ability to readily detoxify the reactive intermediates or easily repair the resulting damage. [e]
- Periodic Table of Elements [r]: A tabular method of displaying the chemical elements. [e]
- Phosphorus [r]: Chemical element (Z=15) vital to life and widely used in fertilizers, detergents and pesticides. [e]
- Physician [r]: A health science professional fully licensed to practice medicine and surgery. [e]
- Radioactivity [r]: The property of the unstable nuclei of chemical elements to decay into another isotope, emitting energy or particles [e]
- Radiochemistry [r]: The chemistry of radioactive materials [e]
- Radiological weapon [r]: A weapon that uses explosives or other mechanical means to disperse radioactive substances that present a hazard of producing acute radiation syndrome or other harmful effects, such as contaminating an area and making it unusable [e]
- Scandium [r]: A silvery-white metallic transition metal, with symbol Sc and atomic number 21. [e]
- Selenium [r]: A chemical element, having the chemical symbol Se, and atomic number (the number of protons) 34. [e]
- Silver [r]: A metallic element with the periodic symbol Ag; a precious metal. [e]
- Sodium [r]: A soft, silvery white, highly reactive element which has the symbol Na and atomic number 11. [e]
- Technetium [r]: A synthetic chemical element, having the chemical symbol Tc, and atomic number (the number of protons) 43. [e]
- Tritium [r]: A radioactive isotope of the chemical element hydrogen containing one proton and two neutrons. [e]
- Unified atomic mass unit [r]: A unit of atomic and molecular mass. [e]
- Uranium [r]: A silvery-white metallic chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. [e]
- Vandium [r]: A chemical element, having the chemical symbol Li, and atomic number (the number of protons) 3. [e]
- Welding [r]: Fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence at a high melting point. [e]
- Wheat [r]: Grass crop grown worldwide and used in making flour and fermentation for alcohol production. [e]
- Yttrium [r]: A chemical element, having the chemical symbol Y, and atomic number (the number of protons) 39. [e]
- Zinc [r]: A chemical element, having the chemical symbol Zn, and atomic number (the number of protons) 30. [e]
