atomic+shell

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• Shell model — In nuclear physics, the nuclear shell model is a model of the atomic nucleus which uses the Pauli principle to describe the structure of the nucleus in terms of energy levels. The model was developed in 1949 following independent work by several… …   Wikipedia

• Shell — may refer to * Animal shell, or exoskeleton, including those of molluscs, turtles, insects and crustaceans * Seashell, the shells of various marine animals, especially marine mollusks * Eggshell, the outer covering of a hard shelled eggAny more… …   Wikipedia

• Atomic orbital — The shapes of the first five atomic orbitals: 1s, 2s, 2px, 2py, and 2pz. The colors show the wave function phase. These are graphs of ψ(x,y,z) functions which depend on the coordinates of one electron. To see the elongated shape of ψ(x,y,z)2… …   Wikipedia

• Atomic nucleus — A figurative depiction of the helium 4 atom with the electron cloud in shades of gray. In the nucleus, the two protons and two neutrons are depicted in red and blue. This depiction shows the particles as separate, whereas in an actual helium atom …   Wikipedia

• Atomic radius — Diagram of a helium atom, showing the electron probability density as shades of gray. The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the nucleus to the boundary of the… …   Wikipedia

• shell atomic model — ▪ physics       simplified description of the structure of atoms that was first proposed by the physicists J. Hans D. Jensen (Jensen, J. Hans D.) and Maria Goeppert Mayer (Mayer, Maria Goeppert) working independently in 1949. In this model,… …   Universalium

• Atomic number — See also: List of elements by atomic number An explanation of the superscripts and subscripts seen in atomic number notation. In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the… …   Wikipedia

• shell — Synonyms and related words: Eustachian tube, L, R, acting area, aim at, alveolation, alveolus, ante up, antrum, anvil, apron, apron stage, armadillo shell, armature, armor, armor plate, armpit, atom, atomic model, attack, auditory apparatus,… …   Moby Thesaurus

• shell nuclear model — ▪ physics       description of nuclei of atoms by analogy with the Bohr atomic model of electron energy levels. It was developed independently in the late 1940s by the American physicist Maria Goeppert Mayer (Mayer, Maria Goeppert) and the German …   Universalium

• atomic weapon — /əˌtɒmɪk ˈwɛpən/ (say uh.tomik wepuhn) noun any weapon (especially a bomb, shell, or missile) in which the destructive power is derived from atomic energy …  

• Nuclear shell model — In nuclear physics and nuclear chemistry, the nuclear shell model is a model of the atomic nucleus which uses the Pauli exclusion principle to describe the structure of the nucleus in terms of energy levels.[1] The first shell model was proposed… …   Wikipedia