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unstable nuclei

См. также в других словарях:

  • Unstable molecules — are a piece of fictional technology featured in Marvel Comics. They exist as a configuration of unknown atomic nuclei and electrons that are responsive to certain energized matter around them. Developed by Reed Richards (Mister Fantastic of the… …   Wikipedia

  • chemical element — Introduction also called  element,         any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed.       This article considers the… …   Universalium

  • Neutron — This article is about the subatomic particle. For other uses, see Neutron (disambiguation). Neutron The quark structure of the neutron. (The color assignment of individual quarks is not important, only that all three colors are present.)… …   Wikipedia

  • atom — /at euhm/, n. 1. Physics. a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical… …   Universalium

  • mean life — Physics. 1. the average time that an unstable particle or nucleus survives before it decays. 2. See decay time. Also called average life, lifetime. * * * In radioactivity, the average lifetime of all the nuclei of a particular unstable atomic… …   Universalium

  • physics — /fiz iks/, n. (used with a sing. v.) the science that deals with matter, energy, motion, and force. [1580 90; see PHYSIC, ICS] * * * I Science that deals with the structure of matter and the interactions between the fundamental constituents of… …   Universalium

  • Atom — The atom is the smallest unit of an element that retains the chemical properties of that element. An atom has an electron cloud consisting of negatively charged electrons surrounding a dense nucleus. The nucleus contains positively charged… …   Wikipedia

  • radioactive series — Physics, Chem. a succession of elements initiated in the radioactive decay of a parent, as thorium or uranium, each of which decays into the next until a stable element, usually lead, is produced. Also called decay series. [1920 25] * * * Any of… …   Universalium

  • Nuclear drip line — In nuclear physics, the boundaries for nuclear particle stability are conceptualized as drip lines. The nuclear landscape is understood by plotting boxes, each of which represents a unique nuclear species, on a graph with the number of neutrons… …   Wikipedia

  • Nuclear physics — For other uses, see Nuclear Physics (disambiguation). Nuclear physics Radioactive decay Nuclear fission Nuclear fusion …   Wikipedia

  • Isotopes of hydrogen — Hydrogen (H) (Standard atomic mass: 1.00794(7) u) has three naturally occurring isotopes, denoted 1H, 2H, and 3H. Other, highly unstable nuclei (4H to 7H) have been synthesized in the laboratory but not observed in nature.Gurov YB, Aleshkin DV,… …   Wikipedia

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