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Topic: Spin quantum number

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	Spin quantum number - Wikipedia, the free encyclopedia
		In atomic physics, the spin quantum number is a quantum number that parametrizes the intrinsic angular momentum (or spin angular momentum, or simply spin) of a given particle.
		The spin quantum number is the fourth of a set of quantum numbers which describe the unique quantum state of an electron and is designated by the letter s.
		The spin property of an electron would classically give rise to magnetic moment which was a requisite for the fourth quantum number.
	en.wikipedia.org /wiki/Spin_quantum_number (980 words)

	Encyclopedia :: encyclopedia : Spin (physics) (Site not responding. Last check: 2007-11-06)
		The spin of composite particles, such as protons, neutrons, atomic nuclei, and atoms, is made up of the spins of the constituent particles, plus the orbital angular momentum of their motions around one another.
		This is understood to refer to the spin of the lowest-energy internal state of the composite particle (i.e., a given spin and orbital configuration of the constituents).
		It is not always easy to deduce the spin of a composite particle from first principles; for example, even though we know that the proton is a spin-1/2 particle, the question of how this spin is distributed among the three internal quarks and the surrounding gluons is an active area of research.
	www.hallencyclopedia.com /Spin_(physics) (1923 words)

	Quantum number - Wikipedia, the free encyclopedia
		In chemistry, this quantum number is very important, since it specifies the shape of an atomic orbital and strongly influences chemical bonds and bond angles.
		However, it should be understood that the elementary particles are quantum states of the standard model of particle physics, and hence the quantum numbers of these particles bear the same relation to the Hamiltonian of this model as the quantum numbers of the Bohr atom does to its Hamiltonian.
		Typical quantum numbers related to spacetime symmetries are spin (related to rotational symmetry), the parity, C-parity and T-parity (related to the Poincare symmetry of spacetime).
	en.wikipedia.org /wiki/Quantum_number (828 words)

	Atom
		The number of protons in an atom (called the atomic number) determines the element of the atom.
		These configurations are determined by the quantum mechanics of electrons in the electric potential of the atom; the principal quantum number determines particular electron shells with distinct energy levels.
		Therefore, elements with the same number of valence electrons are grouped together in the columns of the periodic table of the elements.
	www.brainyencyclopedia.com /encyclopedia/a/at/atom.html (3758 words)

	Electron spin (Site not responding. Last check: 2007-11-06)
		The precise value of g was predicted by relativistic quantum mechanics in the Dirac equation and was measured in the Lamb shift experiment.
		The electron spin magnetic moment is important in the spin-orbit interaction which splits atomic energy levels and gives rise to fine structure in the spectra of atoms.
		The electron spin magnetic moment is also a factor in the interaction of atoms with external magnetic fields (Zeeman effect).
	hyperphysics.phy-astr.gsu.edu /hbase/spin.html (1020 words)

	Hydrogen Schrodinger Equation (Site not responding. Last check: 2007-11-06)
		While the azimuthal dependence of the wavefunction only requires the quantum number to be an integer, the coupling to the colatitude equation further constrains that integer to be less than or equal to the orbital quantum number.
		It is called the magnetic quantum number because the application of an external magnetic field causes a splitting of spectral lines called the Zeeman effect.
		When this is expressed in quantum terms, photon emission is always accompanied by a change of 1 in the orbital angular momentum quantum number.
	hyperphysics.phy-astr.gsu.edu /hbase/quantum/hydazi.html (460 words)

	quantum number (Site not responding. Last check: 2007-11-06)
		is exemplified: for a particle confined in one dimension between parallel plates, by the one quantum number
		is exemplified: for a particle that is confined in three dimensions in a cube, by the three quantum numbers
		most usually is: a number (or one of a set of such numbers) specifying a particular energy eigenfunction (spatial wavefunction) and the corresponding energy eigenvalue (energy level) of the confined particle.
	www.rdg.ac.uk /physicsnet/units/flap/glossary/QQ/QUANNUMB.HTM (143 words)

	ph235 Quantum Physics
		The main quantum number, n, determines the energy of the state (exactly in the case of hydrogen-like atoms; with minor corrections involving the other quantum numbers for multi-electron atoms).
		The spin (quantum number), s, is similar to l in that it refers to an angular momentum component.
		shows the situation for the spin: The spin aligns at an angle with the z axis (which could be a preferential axis generated by applying a magnetic field or by a chemical bond).
	users.aber.ac.uk /ruw/teach/235/spin.html (971 words)

	Quantum Mechanics in Three dimension (Site not responding. Last check: 2007-11-06)
		In either case four quantum numbers are required, one for each of the four degrees of freedom possessed by a single electron.
		The allowed combinations of the n and l quantum numbers are organized in a table, as shown in the figure below and arrows are drawn at 45 degree angles pointing toward the bottom left corner of the table.
		Electrons are added to a subshell with the same value of the spin quantum number until each orbital in the subshell has at least one electron.
	physics.berea.edu /~king/Teaching/ModPhys/QM/Quantum3d_part2.htm (2500 words)

	explain quantum mechanical model of the atom -- explain quantum mechanical model of the atom (Site not responding. Last check: 2007-11-06)
		Quantum Mechanics and the Ether: The Derivation of Planckís Constant
		The quantum theory of the atom, an epochal...
		As previously noted, the chemical bonding energy relies upon quantum mechanical calculations that include the electromagnetic force, the mass of the electron, the speed of light (c), and Planck's...
	www.aratom.com /explainquantummechanicalmodeloftheatom (2135 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		The nature of this interaction is described by the nuclear spin quantum number.
		In nuclei with an even mass number, all the protons and neutrons are paired and their spins cancel, leaving zero nuclear angular momenta (spin = 0).
		The nuclear spin in units of h/2*pi is given for nuclides with half-lives greater than 1 year.
	www.qivx.com /ispt/help/in15.htm (112 words)

	Introduction to Quantum Mechanics (Site not responding. Last check: 2007-11-06)
		This quantum number determines the shape of the orbital and the orbital angular momentum.
		This quantum number determines the direction the orbital points and so the direction in which the electron is travelling.
		The magnetic spin quantum number, m s, is either +½ or -½ and tells us the direction of the bar magnet.
	www.hull.ac.uk /php/chsajb/quantum/part_e.html (534 words)

	Polymer Analysis - Title
		Deuterium and Nitrogen 15 have spin quantum numbers of 1.
		The number of splittings is given by n+1 where n is the number of neighboring (within 3 bonds) magnetically equivalent protons.
		The amplitude is proportional to the number of magnetically equivalent protons of that type in the molecule.
	www.eng.uc.edu /~gbeaucag/Classes/Analysis/Chapter6.html (3704 words)

	quantum number
		In physics, one of a set of four numbers that uniquely characterize an electron and its state in an atom.
		The magnetic quantum number m describes the energies of electrons in a magnetic field.
		The principal quantum number, defining the electron's energy level, corresponds to shells (energy levels) also known by their spectroscopic designations K, L, M, and so on.
	www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0016639.html (318 words)

	Description (Site not responding. Last check: 2007-11-06)
		For a treatment of a spin 1 particle the quadrupolar tensor components are expressed in their matrix form in the default product basis of GAMMA as follows.
		Quadrupolar tensors, and their PAS orientation, will normally be different for each quadrupolar spin to which they are associated.
		Finally, note that when working with an entire spin system one must sum over all spins with the tensors being in the same coordinate system, for our purposes the laboratory system.
	gamma.magnet.fsu.edu /html/modules/rank2/intqub10.htm (2958 words)

	Chemistry : Chapter 3 : Quantum Numbers (Site not responding. Last check: 2007-11-06)
		There are four things you need to know about each quantum number: (1) its name and symbol, (2) the acceptable/possible values of the number, (3) what the number says about the energy of the electron, and (4) what the number says about what the electron is doing.
		That is electrons D and E. The distance from the nucleus is determined by the n quantum number.
		The larger the number, the further from the nucleus.
	www.wwnorton.com /chemistry/concepts/chapter3/ch3_2.htm (1044 words)

	ChemTeam: Quantum Numbers
		There are four quantum numbers; their symbols are n, l, m and s.
		The first of these is the quantum number signified by 'l.' When Sommerfeld started this work, he used n' (n prime), but he shifted it to 'l' after some years.
		The Spin Quantum Number (signified by the letter 's'): spin is a property of electrons that is not related to a sphere spinning.
	dbhs.wvusd.k12.ca.us /webdocs/Electrons/QuantumNumbers.html (921 words)

	Search Tuna Report for electron configuration (Site not responding. Last check: 2007-11-06)
		The atomic number of an element determines the number of electrons in its atom....
		Write the electron configuration for this element, write a set of quantum numbers for the valence electrons, and add the element to the periodic table in the front of your textbook....
		The finished puzzle is a section of the periodic table, so the numbers on each tile are their atomic numbers - that means they increase from left to right and top to bottom....
	www.searchtuna.com /ftlive2/1151.html (1757 words)

	[No title]
		The general trend is an overall increase of I1 with the atomic number across the period.
		That is to be expected since the principal quantum number (electron shell) of the outer electron remains same, while its attraction to the nucleus increases.
		That between the spin magnetic moment and the magnetic field generated by the orbital motion is called spin-orbit coupling.
	www.unlv.edu /faculty/nbala/problem_set13.doc (784 words)

	Modern Theory of Atomic Structure, page 3
		The Spin Quantum Number is the fourth quantum number.
		The values are interpreted as the s = +1/2 being an electron spinning in the opposite direction from an electron spinning at s = -1/2.
		The Shorthand Electronic Configuration of an element is written in terms of the Noble Gas that is closest to it with a fewer number of electrons.
	www.bcpl.net /~kdrews/mtas/modern3.html (646 words)

	Spin Angular Momentum
		e., the square of the spin angular momentum vector of a particle is
		The spin angular momentum for an elementary particle is absolutely conserved, i.
		The major difference between spin and orbital angular momentum is that the spin quantum number can take on more values, i.
	www.physics.nmt.edu /~raymond/classes/ph13xbook/node100.html (111 words)

	The Quantum Numbers (Site not responding. Last check: 2007-11-06)
		The fourth quantum number, the spin quantum number, allows two electrons of opposite spin (or symmetry) into each orbital.
		Not only do the electrons line up with parallel spins in each of the five 3d's but in Cr, one of the 4s electrons is promoted to the 5th 3d orbital giving six orbitals with one electron in each!
		State the four quantum numbers and the possible values they may have.
	www.chemistrycoach.com /quantum.htm (511 words)

	CH11NMR/Post Exam (Site not responding. Last check: 2007-11-06)
		Figure 1 that the spin states are separated by an equal amount of energy (∆E).
		n is the number of equivalent neighbouring nuclei of spin
		J is an indication of the number of bonds between the coupled protons.
	www.chem.bham.ac.uk /villiers/CPD_NMR_HandoutWd6.htm (2827 words)

	Articles - Atom (Site not responding. Last check: 2007-11-06)
		At room temperature, atoms making up gases in the air move at a speed of 500 m/s (about 1100 mph or 1800 km/h).
		The atomic mass ´´A´´, atomic mass number, or nucleon number of an element is the total number of protons and neutrons in an atom of that element, so-called because each proton and neutron has a mass of about 1 amu.
		In 1925, Erwin SchrÃ¶dinger developed a full theory of quantum mechanics, described by the SchrÃ¶dinger equation.
	www.zdiamond.net /articles/Atom (3877 words)

	Here is Definitive Proof that Leptons have spin 1!
		In atomic physics, the spin quantum number is a quantum number that
		sn is the spin quantum number associated with the spin angular
		If we are to define an integer spin for fermions then\nandgt; what will be the spin values for Boseeons.\n\nBoth Fermions and Bosons have integer spin.\nFermions have odd integer spin.\nBosons have even integer spin.\n\nandgt;\nandgt;\nandgt; The answer seems to be that they would now have spin 3/2,5/2,7/2,...
	www.physicsforums.com /showthread.php?threadid=78242 (3362 words)

	Theory/Spin (Site not responding. Last check: 2007-11-06)
		Whether a nucleus has spin depends on the number of protons and neutrons it contains.
		Most elements have at least one naturally occuring isotope with spin which can be detected by using NMR methods.
		However, there are many other nuclei with spin which can exploited by NMR to give structural data.
	www.shef.ac.uk /chemistry/crystal/projects-ug/sillitoe/html2/t2spin.htm (162 words)

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