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	Electron configuration - Wikipedia, the free encyclopedia
		Electron configuration is intimately related to the structure of the periodic table.
		The chemical properties of an atom are largely determined by the arrangement of the electrons in its outermost ("valence") shell (although other factors, such as atomic radius, atomic mass, and increased accessibility of additional electronic states also contribute to the chemistry of the elements as atomic size increases).
		The notion of electron configuration ceases to be relevant, and yields to band theory.
	www.wikipedia.org /wiki/Electron_configuration (1122 words)

	Periodic table - Open Encyclopedia (Site not responding. Last check: 2007-11-03)
		The periodic table of the chemical elements is a tabular display of the known chemical elements.
		A group is a vertical column in the periodic table of the elements.
		Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late 19th and early 20th century.
	open-encyclopedia.com /Periodic_table (858 words)

	Quantum Numbers and Electron Configurations
		The electron configuration of an atom describes the orbitals occupied by electrons on the atom.
		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.
		Electron configurations of the next two elements in the periodic table, for example, could be written as follows.
	chemed.chem.purdue.edu /genchem/topicreview/bp/ch6/quantum.html (2581 words)

	Electron Configurations & The Periodic Table
		In the third period of the table, the atoms all have a neon-like core of 10 electrons, and shell #3 is occupied progressively with eight electrons, starting with the 3s-orbital.
		Its location in the periodic table should not suggest a kinship to the chemistry of the alkali metals, and its role in the structure and properties of organic compounds is unlike that of any other element.
		Transfer of the lone 3s electron of a sodium atom to the half-filled 3p orbital of a chlorine atom generates a sodium cation (neon valence shell) and a chloride anion (argon valence shell).
	www.cem.msu.edu /~reusch/VirtualText/intro2.htm (2091 words)

	Electron Configurations and the Periodic Table (Site not responding. Last check: 2007-11-03)
		The periodic table is structured so that elements with the same type of valence electron configuration are arranged in columns.
		The reason is that the 5s and 4d energy levels are quite close and certain electronic arrangements can result in the levels being slightly different than expected.
		What is the electron configuration for Nickel in terms of the nearest noble gas?
	wine1.sb.fsu.edu /chm1045/notes/Struct/EPeriod/Struct09.htm (236 words)

	Periodic Table (electron Configurations) Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-11-03)
		Electron configurations of the neutral gaseous atoms in the ground state.
		Configurations of elements with light gray background are uncertain or not available.
		The bracketed noble gas symbols on the left represent the inner configurations that are the same in each period.
	www.stardustmemories.com /search/encyclopedia/Periodic_table_%28electron_configurations%29 (402 words)

	Read about Periodic table at WorldVillage Encyclopedia. Research Periodic table and learn about Periodic table here! (Site not responding. Last check: 2007-11-03)
		John Alexander Reina Newlands, who in 1865 noticed that the elements of similar type recurred at intervals of eight, which he likened to the octaves of music, though his law of octaves was ridiculed by his contemporaries.
		Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late
		Periodic Table of the Fermi Surfaces of Elemental Solids (http://www.phys.ufl.edu/fermisurface/periodic_table.html)".
	encyclopedia.worldvillage.com /s/b/Periodic_table (883 words)

	periodic table on Encyclopedia.com (Site not responding. Last check: 2007-11-03)
		In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled Periodic Table).
		This is in keeping with current interpretations of the periodic law which holds that the elements in a group have similar configurations of the outermost electron shells of their atoms.
		The elements of a period are characterized by the fact that they have the same number of electron shells; the number of electrons in these shells, which equals the element's atomic number, increases from left to right within each period.
	www.encyclopedia.com /html/p1/periodtbl.asp (838 words)

	CHEMTUTOR ATOMIC STRUCTURE (Site not responding. Last check: 2007-11-03)
		The sequence of addition of the electrons as the atomic number increases is as follows with the first number being the shell number, the s, p, d, or f being the type of subshell, and the last number being the number of electrons in the subshell.
		Electron configuration is the "shape" of the electrons around an atom, that is, which energy level (shell) and what kind of orbital it is in.
		These electrons may be grouped as each electron alone in one of the positions around the element symbol or as a group of two (s) electrons in one position and one electron in another.
	www.chemtutor.com /struct.htm (4244 words)

	Periodic table (electron configurations) (Site not responding. Last check: 2007-11-03)
		For each row of elements only new are displayed all shells shown on previous are fully occupied (to obtain the full add the configurations of the most rightmost the noble gases in all rows above).
		With increasing atomic number shells and sub shells are filled a fairly consistent way: first 1s then 2p 3s and 3p but 4s is before 3d.
		The reason for these irregularities is besides the attraction between the positive atomic nucleus and the electrons the latter repel other as well.
	www.freeglossary.com /Periodic_table/Electron_configurations (609 words)

	COTW07
		When an electron microscope is used to achieve very high magnifications, the electrons are exhibiting wave properties in much the same fashion as the light in an ordinary light microscope.
		An energy of zero for the electron means that the electron is infinitely far from the nucleus (shell with n=infinity) and not moving.
		Electron Affinity: The first electron affinity generally becomes more exothermic (electron gain is more favored) from left to right across a given period, with a few exceptions.
	www.yk.psu.edu /~jhb3/cotw07.htm (2450 words)

	Electron Configurations of Atoms and Ions (Site not responding. Last check: 2007-11-03)
		Successive positions of an electron are not correlated, but we can keep track of all of the locations, and build up a probability distribution of that electron.
		The configuration notation is introduced, and the elements from Li to Cl then appear in a quiz of a type which will be used henceforth: to write the configuration in the conventional notation (e.g.
		Configurations are correlated with chemical properties for the representative elements.
	www.fsj.ualberta.ca /chimie/learning_tools/lessonec.html (474 words)

	Electronegativity
		Electronegativity is useful for all elements on the periodic table but it is most useful for the nonmetals, which are shown here to the right.
		So as you go from fluorine to chlorine to bromine and so on down the periodic table, the electrons are further away from the nucleus and better shielded from the nuclear charge and thus not as attracted to the nucleus.
		The reason for that ties in with the arrangement of electrons and the fact that the atoms are using d orbitals.
	dl.clackamas.cc.or.us /ch104-07/electron.htm (1104 words)

	Periodic Tables (Site not responding. Last check: 2007-11-03)
		The Periodic Table of the Elements Groton HS Periodic Table (Hardcorp)
		Periodic Table of the Elements University of Colorado
		Periodic Table The Periodic Table By: Levi, Primo
	www.chemistrycoach.com /periodic_tables.htm (1659 words)

	Chemistry Teaching Resources - Periodic Tables and Related Material
		A clickable periodic table with VRML 1.0 representations of the atoms.
		This Periodic Table of the Elements serves as a guide to summarize which Force Fields (FF), Semiempirical Parameterizations (Semi), and ab initio Basis Sets (Basis) have been developed and are documented and available for modeling each element.
		The periodic table is supplied by Resource-World.Net, an educational site designed to give viewers a greater appreciation for where the materials we depend upon for every day life come from and the processes involved in making them.
	www.anachem.umu.se /cgi-bin/pointer.exe?PeriodicTables (2509 words)

	CHEMystery: Atomic Structure and Bonding: Electron Configurations
		The distributions of electrons among the orbitals of an atom is the atom's electronic structure or electron configuration.
		The Periodic Table of the Elements is constructed and arranged so that similar chemical properties were arranged in verticle collumns called groups.
		The core electrons are the rest of the electrons, and they are buried deep within the atom and usually do not play a role in chemical reactions.
	library.thinkquest.org /3659/structures/electronconfig.html (740 words)

	Writing Electron Configurations
		The main goal of this module is to be able to write the electron configurations for atoms and ions.
		An electron configuration shows how the electrons are divided up among the orbitals in an atom.
		We can use a shorthand to indicate all of the electrons that are identical to helium's configuration by putting He in square brackets, and substituting it for those electrons.
	www.brazosport.cc.tx.us /~chem/tutor/elecconf.html (1066 words)

	Electron Configurations (Site not responding. Last check: 2007-11-03)
		Electrons having opposite spins are said to be "paired" electrons, as with the electrons occupying the Li 1s orbital
		Electronic configurations can also be written in a short hand which references the last completed orbital shell (i.e.
		The electrons in the stable (Noble gas) configuration are termed the core electrons
	wine1.sb.fsu.edu /chm1045/notes/Struct/EConfig/Struct08.htm (617 words)

	Chemistry 103
		Be able to describe how elements are arranged in the periodic table, name the subdivisions of the periodic table, and relate the position of an element in the table to its electron configuration.
		Atomic spectra suggest that electrons occur in discrete energy levels.
		Be able to write the electron configurations for the first 18 elements.
	www.uaf.edu /chem/103f03/f03-6.htm (144 words)

	Chapter Information
		Mendeleev stated that the properties of the elements are a periodic function of their atomic masses.
		As you have already seen, atoms with similar electron configurations are placed in the same column.
		This table is called the periodic table of the elements.
	home.earthlink.net /~ssbeaton/addlinfo/historypertable.html (603 words)

	Electronic Configuration of Elements
		Mendeleev noticed the recurrence of properties of elements as the atomic weight increased, and he invented the Periodic Table of Element, which is a useful tool for organizing and correlating chemical and physical properties of chemical elements.
		This is done by treating the electron shield cores as a proton but the core has an effective nuclear charge Z. For the H-like atoms, energy levels for 2s, 2p stay the same, but the separation between 2s and 2p energy levels increases as the atomic number (Z) increases.
		In an ordinary periodic table, the s, p, and d block elements are in the main body of the Periodic Table, whereas the f block elements are placed below the main body.
	www.science.uwaterloo.ca /~cchieh/cact/c120/eleconfg.html (1033 words)

	Periodic Table & Misc. Figures (Site not responding. Last check: 2007-11-03)
		This Periodic Table is designed to illustrate the way electron configurations illustrate the blocks in the Periodic Table.
		The electron configuration of each group is given at the top of each group.
		The table is color coded based upon whether the element was discovered before the 18th century or during the 18th, 19th, or 20th centuries.
	www.monroecc.edu /wusers/flanzafame/PeriodicFigs.htm (416 words)

	Electron Configuration and the Periodic Table (Site not responding. Last check: 2007-11-03)
		There is a pattern between the electron configuration for the elements and their positions on the periodic table.
		Compare the electron configuration of an element and its position on the periodic table.
		Click to see the periodic table in terms of electron configurations.
	nobel.scas.bcit.ca /chem0010/unit3/3.4.4_electronConfig_ptable.htm (342 words)

	Why Every English Classroom Should Have a Periodic Table? (Site not responding. Last check: 2007-11-03)
		To grasp the immensity of the periodic table, one must understand ionization potentials, atomic radii, patterns of electron structure, combining capacities, electronegativities, charges on ions, etc. etc.
		The boxes in the table are important indeed for not quite the same reason that the Museum of Modern Art (MOMA) in Manhattan humorously displayed, for many years, a kind of periodic table of ears.
		As I stare at the table, the lines grow dimmer and dimmer and patterns swirl about and sweep across the table as it grows larger, simmering and seething, until it encompasses the entire world and then the universe.
	www.chemistrycoach.com /whyevery.htm (1180 words)

	Electrons and the Periodic Table II (Site not responding. Last check: 2007-11-03)
		Electrons and the Periodic Table II Electron Configurations and the Periodic Table II I've never come right out and said this, but I'm sure you've noticed that the energy levels get filled in order from lowest energy to highest; when you add a new electron, it goes into the lowest-energy state that's available.
		This periodic table ends at krypton, when the 4p orbitals are filled--but of course one can keep going.
		here to open an extended version of the periodic table, which shows the electron configurations for the elements up to 103.
	www.colorado.edu /physics/2000/elements_as_atoms/elevels.html (338 words)

	General Chemistry Online: Companion Notes: The periodic table
		These lectures use the periodic table to explore the connections between the properties of the elements and their electron configurations.
		All have identical valence n and identical numbers of electrons, so the larger Z is, the smaller the atom or ion.
		On the basis of gross periodic trends, one might expect O to have a higher ionization energy than N. However, the ionization energy of N is 1402 kJ/mol and the ionization energy of O is only 1314 kJ/mol.
	antoine.frostburg.edu /chem/senese/101/periodic/index.shtml (1022 words)

	Electrons and the Periodic Table (Site not responding. Last check: 2007-11-03)
		First of all, I can see from the chart that the lowest row only has s electrons, but the next row has electrons in both the s level and the p level, or whatever you're supposed to call them...
		The way the periodic table is arranged is starting to make sense to me now.
		The rows of the table match up with the primary energy levels--that's why the first row only has two elements.
	www.colorado.edu /physics/2000/elements_as_atoms/states2.html (329 words)

	Chemistry : Periodic Table : hydrogen : electronic configuration data
		The following represents the electronic configuration and its associated term symbol for the ground state neutral gaseous atom.
		The configuration associated with hydrogen in its compounds is not necessarily the same.
		In 1885 Balmer found a simple mathematical relationship between the wavelengths of the then 14 known lines of H; a major milestone in the history of our understanding of the basis of all spectra.
	www.webelements.com /webelements/elements/text/H/econ.html (144 words)

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