LYCOS RETRIEVER 
Periodic Table: Atoms
built 137 days ago
By all accounts, Periodic Table from Synergy Creations is a real winner for the high school classroom. The most important feature of a science reference program is information. Is it displayed clearly? Is it complete? Is it is easily obtained? Periodic Table definitely delivers on all these fronts, and arguably has the best, easiest-to-use interface of all the atomic reference programs.
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The lack of numerical or analytic connection between the traditional two-dimensional periodic table and methods used to predict the structure and reactivity of molecules and solids has long reduced the table's usefulness. However, configuration energy, introduced as a new dimension of the periodic table, is just the average atomic energy level, and simultaneously the average density of states, for the atoms out of which the molecular-orbit–energy-level diagrams and energy bands in solids are constructed, thereby tying the periodic table directly to present-day research techniques. See ... Molecular orbital theory; Molecular structure and spectra.
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Platinum is a chemical element in the periodic table that has the symbol Pt and atomic number 78. A heavy, malleable, ductile, precious, gray-white transition metal, platinum is resistant to corrosion and occurs in some nickel and copper ores along with some native deposits. Platinum is used in jewelry, laboratory equipment, electrical contacts, dentistry, and automobile emissions control devices.
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ELEMENTAL OR METALLIC MERCURY, the slippery quicksilver that used to spill out of broken thermometers, is made up of single atoms, No. 80 on the Periodic Table of Elements. Mercury can combine with other elements to form compounds; these compounds are called organic mercury if they include a carbon atom, inorganic mercury if they do not.
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The periodic table is the most important reference a chemist has because it puts all the known elements into a meaningful pattern. Elements are arranged left to right and top to bottom in order of increasing atomic number. This order generally goes with increasing atomic mass.
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How about the next level of argument, namely, that it is obvious to substitute any element for another because they are all members of the atomicly stable portion of the Periodic Table? Remember, manganese and magnesium kind of sound alike according to the US Supreme Court.
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Atoms