21. International Union Of Pure And Applied Chemistry of an irreducible tensor of order l representing the V ab, elements of Cartesian electricfield gradient 2000 International Union of Pure and Applied chemistry. http://www.iupac.org/reports/1997/6912harris/symroman.html

I U P A C Standing Committees Divisions Projects Reports ... Home Page Pure Appl. Chem. Vol. 69, No. 12, pp. 2489-2495, 1997. PHYSICAL CHEMISTRY DIVISION COMMISSION ON MOLECULAR STRUCTURE AND SPECTROSCOPY Parameters and Symbols for Use in Nuclear Magnetic Resonance (IUPAC Recommendations 1997) a or A Hyperfine (electron-nucleus) coupling constant A q (l,m) The m th component of an irreducible tensor of order l representing the nuclear spin operator for an interaction of type q B Magnetic field (strictly the magnetic flux density or magnetic induction) B Static magnetic field of an NMR spectrometer B B Radiofrequency magnetic fields associated with frequencies v v B L Local magnetic field (components B x L B y L B z L ) of random field or dipolar origin C Spin-rotation interaction tensor C X Spin-rotation coupling constant of nuclide X D Dipolar interaction tensor D Dipolar coupling constant between two nuclei (say 1 and 2), ( m p g g h p r , in frequency units ( footnote 1 D C Nuclear receptivity relative to that of the carbon-13 nucleus D p Nuclear receptivity relative to that of the proton (hydrogen-1 nucleus) E Electric field strength F Spectral width F F (or f f The two frequency dimensions of a two-dimensional spectrum (use F etc. for higher orders)

22. Selected Classic Papers From The History Of Chemistry Historically important papers in the fields of Atomic hypothesis and discrete nature of matter Electricity, electrochemistry, and electrolyte solutions The electron and electronic structure of matter elements nature, number, and discovery Environmental chemistry Gases Periodic table and periodic law Radioactivity and the nucleus Thermodynamics http://maple.lemoyne.edu/~giunta/papers.html

Selected Classic Papers from the History of Chemistry has moved to http://webserver.lemoyne.edu/faculty/giunta/papers.html Please adjust your bookmarks accordingly. I apologize for the inconvenience. Back to the top of the Classic Chemistry site

23. Chemistry Dictionary Terms "L" chemistry Dictionary. Terminology L . Lanthanides elements 58 to 71 (after lanthanum)Lanthanide Contraction A decrease in the radii of the elements following http://www.netaccess.on.ca/~dbc/cic_hamilton/dictionary/l.html

Chemistry Dictionary Terminology "L" A B C D ... Z Lanthanides Elements 58 to 71 (after lanthanum) Lanthanide Contraction A decrease in the radii of the elements following the lanthanides compared to what would be expected if there were no f-transition metals. Law of Combining Volumes (Gay-Lussac's Law) At constant temperature and pressure, the volumes of reacting gases ( and any gaseous products) can be expressed as ratios of small whole numbers; Law of Conservation of Energy Energy cannot be created or destroyed; it may be changed from one form to another. Law of Conservation of Matter There is no detectable change in the quantity of matter during an ordinary chemical reaction. Law of Conservation of Matter and Energy The total amount of matter and energy available in the universe is fixed. Law of Definite Proportions (Law of Constant Composition) Different samples of a pure compound always contain the same elements in the same proportions by mass. Law of Partial Pressures (Dalton's Law) The total pressure exerted by a mixature of gases is the sum of the partial pressures of the individual gases. Lead Storage Battery Secondary voltaic cell used in most automobiles.

24. Actinides Illustrated article, covering the uses of these elements in nuclear chemistry, and related research initiatives. http://www.llnl.gov/str/Terminello.html

UNDERSTANDING the periodic table, with its assemblage of columns and rows of elements, has been a perennial challenge for chemistry students. (See the below.) Understanding at the atomic level a remarkable row of elements has been a particular research challenge for Lawrence Livermore scientists over the years. That row is called the actinides, a collection of 14 radioactive elements named after the element actinium. "There's a tremendous amount we don't know about the actinides," says Lawrence Livermore chemist Lou Terminello, who leads the Materials Science and Technology Division of the Chemistry and Materials Science Directorate. To learn more about these elements, he says, the Department of Energy funds about $100 million per year for research at Lawrence Livermore. The research is conducted by teams of chemists, physicists, engineers, metallurgists, and environmental scientists on a diverse set of national security and environmental issues. Terminello says that a more fundamental understanding of actinides is needed to better assess the nation's nuclear stockpile, help stem the clandestine proliferation of nuclear weapons, and better understand the implications of nuclear fuels' (such as enriched uranium) use and storage. Environmental contamination by actinides is also a major concern at several major DOE facilities. In addition, actinides such as uranium, neptunium, plutonium, and americium are the major contributors to the long-term radioactivity of nuclear waste currently targeted for the proposed Yucca Mountain repository in Nevada.

25. Chemistry Dictionary Terms "p" chemistry Dictionary. Periodic Table An arrangement of elements in order of increasingatomic O 22 pH Negative logarithm of the concentration (mol/L) of the H http://www.netaccess.on.ca/~dbc/cic_hamilton/dictionary/p.html

Chemistry Dictionary Terminology "P" A B C D ... Z Pairing A favourable interaction of two electrons with opposite m , values in the same orbital. Pairing Energy Energy required to pair two electrons in the same orbital. Paramagnetism Attraction toward a magnetic field, stronger than diamagnetism, but still weak compared to ferromagnetism. Partial Pressure The pressure exerted by one gas in a mixture of gases. Particulate Matter Fine divided solid particles suspended in polluted air. Pauli Exclusion Principle No two electrons in the same atom may have identical sets of four quantum numbers. Percentage Ionization The percentage of the weak electrolyte that ionizes in a solution of given concentration. Percent by Mass 100% times the actual yield divided by theoretical yield. Percent Composition The mass percent of each element in a compound. Percent Purity The percent of a specified compound or element in an impure sample. Period The elements in a horizontal row of the periodic table Periodicity Regular periodic variations of properties of elements with atomic number (and position in the periodic table). Periodic Law The properties of the elements are periodic functions of their atomic numbers.

26. Chemistry 1911 1911 Nobel Prize in chemistry for the discovery of the elements radium and polonium, by the isolation of radium and the study of the nature and compounds of radium. First person to win two nobel prizes. http://www.nobel.se/chemistry/laureates/1911/index.html

The Nobel Prize in Chemistry 1911 "in recognition of her services to the advancement of chemistry by the discovery of the elements radium and polonium, by the isolation of radium and the study of the nature and compounds of this remarkable element" Marie Curie, née Sklodowska France Sorbonne University Paris, France b. 1867 (in Warsaw, Poland) d. 1934 The Nobel Prize in Chemistry 1911 Presentation Speech Marie Curie Biography ... Nobel Prize in Physics 1903 The 1911 Prize in: Physics Chemistry Physiology or Medicine Literature ... Peace Find a Laureate: Last modified June 16, 2000 The Official Web Site of The Nobel Foundation

27. ASU Noble Library - Property U - Z Science Reference Room Index to Physical, Chemical and Other Property Data U Z. Webelements(Univ of Sheffield) http//www.shef.ac.uk/chemistry/web-elements/. http://www.asu.edu/lib/noble/chem/prop-uz.htm

Science Reference Room Index to Physical, Chemical and Other Property Data U - Z A B C D ... X-Z U ULTRAVIOLET (UV) SPECTRA See Also: "Ultraviolet" on the Spectroscopy page. Resources: Data for Biochemical Research QP520 .D37 Science Reference Environmental Fate Database: Chemfate http://esc.syrres.com/efdb/Chemfate.htm Environmental Fate Database: Datalog http://esc.syrres.com/efdb/Datalog.htm A B C ... X-Z UNIQUAC Constants See: Activity Coefficients A B C ... X-Z UPPER EXPLOSIVE LIMIT See: Explosive Properties Flammability Flash Point A ... X-Z USE TEMPERATURE See: Service Temperature A B C ... X-Z UV SPECTRA See: Ultraviolet Spectra A B C ... X-Z V VAN DER WAAL CONSTANTS Smithsonian Physical Tables QC61 .S6 Science Reference (shelved at desk) A B C D ... X-Z VAN LAAR CONSTANTS See: Activity Coefficients VAPOR DENSITY See Also: MSDS Resources: Agrochemical Chemicals Desk Reference TD196.A34 M66 Science Reference Building Materials: Dangerous Properties RA1229.3 .S56 Science Reference Comprehensive Guide to the Hazardous Properties of Chemical Substances RA1211 .P38 Science Reference

28. Argonne Chemistry Intranet (Internal Only) Windows program for the interactive analysis of crystal field spectra of fblock elements. http://chemistry.anl.gov/downloads/spectra/

Spectra Spectra is a program for paramagnetic ions energy levels calculations. It allows to calculate electronic structure of all elements with unfilled f-shells, including lanthanides and actinides in crystalline hosts. It could be used in scientific research, educational institutions, industry (laser materials, chemical analysis etc). User friendly Windows interface allows to customize the number of terms to be included in calculation (up to all terms in a given electronic configuration), obtain the values of reduced matrix elements for all d- and f-elements. Crystal field parameters could either be adjusted to fit experimental levels or calculated using exchange charge model (not included in this version). Fully consistent J-J' mixing is included for crystal field of any symmetry. Optical and ESR spectra can be analyzed using unified approach with exact decomposition of wavefunctions for each specific energy level. Free-ion Hamiltonian for f-electrons includes Coulomb interaction; configurational interaction; spin-orbit coupling; spin-spin and spin-other-orbit interaction, correction to spin-orbit coupling due to configuration interaction. Total number of free-ion parameters is 19: F2, F4, F6 for Coulomb interaction; dzeta for spin-orbit coupling; alpha, beta and gamma for two-body integrals in configuration interaction; T2, T3, T4, T6, T7, T8 for three-body configuration interaction; M0, M2, M4 for Marvin integrals of magnetic interactions; P2, P4, P6 for spin-orbit corrections due to configuration interaction.

29. Kosmoi: Chemical Elements on August 31, 1997, by the International Union of Pure and Applied chemistry (IUPAC)in Geneva. Featured Bestselling Books Chemical elements. David L. Heiserman http://kosmoi.com/Science/Chemistry/Elements/

Atoms Physics Chemistry Table of the Elements Chemical Elements Nature Agriculture Animals Biology ... The Ingredients: A Guided Tour of the Elements Philip Ball Hydrogen: The Essential Element John S. Rigden Nature's Building Blocks: An A-Z Guide to the Elements John Emsley Elements of Chemical Reaction Engineering (3rd Edition) H. Scott Fogler, Scott H. Fogler The Periodic Kingdom: A Journey into the Land of the Chemical Elements (Science Masters Series) P. W. Atkins Chemistry of the Elements N. N. Greenwood, A. Earnshaw A Guide to the Elements Albert Stwertka Exploring Chemical Elements and Their Compounds David L. Heiserman Chris Oxlade The Elements John Emsley Elements are the building blocks of nature. Chemical elements are the fundamental materials of which all matter is composed. An element is a pure substance that cannot be broken down or reduced further without changing its properties. Water, for example, is a compound composed of two elements: hydrogen and oxygen The smallest amount of an element that can exist is an atom . An atom is made up of subatomic particles . The most important of these are protons, which have positive electrical charges;

30. ChemWeb.com | Journals Publishes research papers and short communications in the following areas the chemistry, structure, and function of metalloenzymes; the interaction of inorganic ions and molecules with proteins and nucleic acids; the preparation and properties of coordination complexes of biological interest including both structural and functional model systems; the role of metalcontaining systems in the regulation of gene expression; the application of spectroscopic methods to determine the structure of metallobiomolecules; the function of trace elements in living systems; and related subjects. http://chemweb.com/library/elsevier/effect/display.exe?jcode=jib

31. Kosmoi: An Overview Of Chemistry Antoine Lavoisier is considered to be the father of modern chemistry because of hisdistinction between elements and compounds and his insistance that chemical http://kosmoi.com/Science/Chemistry/

Biology Physics Science Vitamins ... More Products An Overview of Chemistry Nature Agriculture Animals Biology ... Uncle Tungsten: Memories of a Chemical Boyhood Oliver W. Sacks Recommendation: Chemistry: Concepts and Problems : A Self-Teaching Guide Clifford C. Houk, Richard Post Recommendation: Mendeleyev's Dream : The Quest For the Elements Paul Strathern Recommendation: Bright Earth: Art and the Invention of Color Philip Ball Chemistry is the branch of science concerned with the properties, structure, and composition of substances and their reactions with one another. There are two main divisions, organic and inorganic. Organic chemistry originated with the isolation of medical compounds from animals and plants. It has expanded to include the reactions of carbon based compounds (which are 100 times more numerous than non-carbon based compounds) and the study of molecules. Inorganic chemistry studies the preparation, properties, and reactions of all chemical elements and compounds except those that are carbon based. The study of chemistry began as the combination of ancient technologies, such as metallurgy and soap making, the medieval attempts to make gold, and efforts to improve medicine.

32. Barron Research Group - Rice University - Andrew R. Barron Focuses on the chemistry of the group 13 elements with oxide and chalcogenide ligands. http://python.rice.edu/~arb/Barron.html

Welcome to the Barron Research Group Department of Chemistry Department of Mechanical Engineering and Materials Science Rice University, Houston, Texas Andrew R.Barron Current Courses Current Group Conferences and Seminars ... To Contact Andrew Barron Note: If you are using Microsoft Explorer to view this site, you may want to set yourTextZoom view at 75% Andrew R. Barron , Charles W. Duncan, Jr. - Welch Professor Items of Special Interest Representatives from Halliburton Company visit Rice to present funds to Prof. Barron and the Wiess School of Natural Science. Photos here Texas Center for Crystallography submission forms can be found here Course Information Inorganic Chemistry - CHEM360 - Spring 2003 Inorganic Seminar - CHEM 600 - Spring 2003 Effective Presentations for Chemists - CHEM606 - Spring 2003 -TBA Management for Science and Engineering MGMT 750/CHEM 750/MSCI 750 Management for Science and Engineering - Fall 2002 Andrew R. Barron -

33. Periodic Table Of Elements Detailed data, basic nuclides, limited writeups, requires Javascript A Javascript based periodic table. http://atlas.chemistry.uch.gr/ptoe/

Sorry, your browser does not support frames. Come back with a frame-enabled browser.

34. Ljudmila Benedik Ljubljana, Slovenia, 1989; Ph.D. in chemistry, Univ M. Dermelj, V. Stibilj, AR Byrne,L. Benedik, Z. Slejkovec of some essential and toxic trace elements in food http://www2.ijs.si/~des/Staff/ljudmila_benedik.htm

Dr. Ljudmila Benedik Contact information Office: Address: Jozef Stefan Institute , Dept. of Environmental Science, Laboratory for Radiochemistry , Jamova 39, 1000 Ljubljana Slovenia Phone: +386 1 58 85 450 Fax: +386 1 16 12 335 Email: ljudmila.benedik@ijs.si Home: Address: Skofja Loka Slovenia Biographical sketch born July 31, 1956, Bukovscica , Skofja Loka, Slovenia B.Sc. in Chemistry, Univ. Ljubljana, Slovenia, 1981 M.Sc. in Chemistry, Univ. Ljubljana, Slovenia, 1989 Ph.D. in Chemistry, Univ. Ljubljana, Slovenia, 1994 Senior researcher, Dept. of Environ. Sci. Areas of research development of nuclear and nuclear-related analytical methods radiochemical methods for trace uranium and thorium alpha and gamma spectrometry beta counting liquid scintilation technique Scientific publications: A. R. Byrne, L. Benedik: Determination of uranium at trace levels by radiochemical neutron activation analysis employing radioisotopic yield evaluation, Talanta, 35, 161-166 (1988). Z. Jeran, F. Batic, A. R. Byrne, L. Benedik, P. Stegnar: Biomonitoring uranium contamination around the uranium mine at Zirovski vrh using epiphytic lichens, Proc. Heavy Metals in the Environment (Geneva,1989) CEP consultants Ltd, ISBN 905941 38 1 (vol.2), 476-479 (1989).

35.   Mr.Bright's Chemistry Home Page Contains links to an interactive Periodic Table of elements, a summary of molecular shapes and electron pair geometry, as well as animations on molecular models. http://mrbright.8m.com/

This page uses frames, but your browser doesn't support them. so don't worry Please follow this link to enter the site

36. Personal Data - Vekoslava Stibilj analytical chemistry; radiochemical separation of trace elements. Dermelj,M., Benedik, L., Stibilj, V., Slejkovec, Z., TusekZnidaric, M http://www2.ijs.si/~des/Staff/vekoslava_stibilj.htm

Dr. Vekoslava Stibilj Contact information Office: Address: Jozef Stefan Institute, Dept. of Environmental Sciences, Laboratory for Radiochemistry, Jamova 39, 1111 Ljubljana, Slovenia Phone: +386 1 58 85 352 Fax: +386 1 16 12 335 Email: vekoslava.stibilj@ijs.si Home: Address: Crtomirova 21 1000 Ljubljana, Slovenia Biographical sketch born June 6, 1956, Ustje, Ajdovscina, Slovenia B.Sc. in Chemistry, Univ. Ljubljana, Slovenia, 1980 M.Sc. in Chemistry, Univ. Ljubljana, Slovenia, 1983 Ph.D. in Chemistry, Univ. Ljubljana, Slovenia, 1994 research scientist, Dept. of Environ. Sci. Areas of research analytical chemistry radiochemical separation of trace elements Scientific publications: Stekar, J., Stibilj, V., Celan, F.: Prebavljivost silaze iz stranskih produktov susenja krompirja za nesnice. Zb. Biotehniske fak., Univ. Edvarda Kardelja v Ljubljani, Kmetijstvo (Zivinoreja), Domzale, VTOZD za Zivinorejo BF, 46 (1985) 7-18. Stanovnik, B., Stibilj, V., Tisler, M. Transformations of heterocyclic amidines and amide oximes: Synthesis of s-triazolo(1',5':1,6)- -pyrimido(4,5-c)pyridazines, s-triazolo(1',5': 2,3)pyridazino- -(4,5-c)quinoline and 7H-2,3,4,6,7- pentaazabenz(d,e)anthracene. Derivatives of novel heterocyclic sistems. Synthesis, 10 (1986) 807-810.

37. Quiz Hub - Online Learning Activities: Educational Games, Puzzles, And Quizzes Online learning activity to help chemistry students memorize the locations of common elements within the periodic table. http://quizhub.com/quiz/periodictable.cfm

Free Quizzes Arithmetic: Multiplication Facts Analytical Thinking: Logic Puzzle English: Scrambled Words Geography: U.S. State Capitals ... World / U.S. History Timeline Premium Collection Account: Password: Level: Grades K-5 Grades 6-12 Subscription Information The Quiz Hub includes hundreds of fun online interactive learning quizzes that help K-12 students enhance their core knowledge of English, languages, math, science, and social studies. Complete List of Quizzes Privacy Statement We do not give, trade, or sell information about our visitors to third parties. KidsHub.org High School Hub Coming Soon - Spelling Hub Request a Free Trial for Your School If you would like for your entire school to have a two-week free trial of the Quiz Hub, just FAX your request on official school letterhead to 707-371-1539. Please include your email address. We will email a password to you within 24 hours. 534 Village Blvd North, Baldwinsville NY 13021, dyann@schmidel.com

38. The Purpose Contains xray spectra of elements on the periodic table. The spectra are drawn with a java applet.Category Science chemistry Education Multimedia...... In chemistry, values of n start at 1 and increase in we were able to fluoresce onlythe L shell electrons. All of the elements with Z 83 are radioactive. http://ie.lbl.gov/xray/

This website is best viewed with a IE 4.0 or a or above. Click here or on the periodic table at the bottom of this document to view the x-ray spectra of 63 elements. Viewing the Periodic Table of the Elements with X-rays Gregory Rech , Jeffrey Lee , Eric B. Norman , Ruth-Mary Larimer , and Laura Guthrie Lawrence Berkeley National Laboratory, Berkeley, CA University of California, Berkeley, CA University of California, Irvine, CA Acalanes High School, Lafayette, CA History , and in 1901 he was awarded the very first Nobel Prize in physics for this discovery . Soon after, Charles Glover Barkla discovered that each element has its own characteristic x-ray spectrum . He was awarded a Nobel Prize in physics for this discovery in 1917 . Sir William Henry Bragg and his son, Sir William Lawrence Bragg, were then able to experimentally prove that the discrete electron energy levels of an atom, an idea proposed by Niels Bohr, actually existed . They were awarded the Nobel Prize in physics for this in 1915 . After this groundwork in x-ray spectroscopy was established, Henry Moseley showed that each element’s characteristic x-ray energy spectrum followed the predictions of the Bohr atomic model . He developed a graphical method to display this data, now known as the Moseley diagram, which is displayed in Figure 1. This diagram was the first way that scientists were able to definitively establish the atomic numbers of the elements

39. A To Z (from) Chemistry, Interactive Periodic Table Of The Elements Basic data Interactive version of the periodic table with pictures of elements. Includes a printable version. http://site.ifrance.com/okapi/chemistry.htm

Interactive Periodic table with pictures of the elements Printable periodic table, Word format (105K) Specific Heat Capacity of the Elements Heat of Fusion of the Elements Heat of Vaporization of the Elements ... Options Ivan Noels

40. Marion L. Carroll's Profile Journal of Medicinal chemistry 36 580590, 1993. and Retroposition Potential in RecentlyIntegrated Alu elements. Myers, J., Ahmed, Z., Nguyen, L, Sammarco, M http://webusers.xula.edu/mlcarrol/mlcarrollprofile.html

Marion L. Carroll, Ph.D., Assistant Professor OFFICE: NCF-305, Laboratory: NCF-304 Back to Home Xavier University Department of Chemistry 1 Drexel Drive New Orleans, LA 70125 Tel (504) 483-7371 Fax (504) 485-7942 Email mlcarrol@xula.edu EDUCATION: Ph.D. Biochemistry/Molecular Biology, LSU Health Sciences Center, 2001 M.S. Biochemistry, University of Vermont, 1985 B.S. Biochemistry, Xavier University, 1983 ABSTRACT: Alu elements are the most abundant and stable short interspersed retroposons within the haploid human genome. Alu has expanding to about 500,000 copies over 65 million years of primate evolution. The autonomous expansion or retroposition is the principle dispersal mechanism. Recently integrated young Alu (Ya5, Ya8, and Yb8) has contributed to genetic variation within and between extant primate species and worldwide human populations. In addition to being approximately 25% polymorphic (present or absent) in humans, these elements are nearly absent from non-human primate genomes. Sequence alignment and mutational analysis of all young elements confirm the point of divergence in human/great ape evolution to be between 4-7 million years. We have identified over 500 young Alu elements and 3 new subfamilies (Yc1, Yc2, and Yb9) using the expanding human genome sequence database and PCR. A fourth subfamily (Ya5a2) may contain a "master" or source gene as evident by its involvement in de novo retroposition events resulting in disease manifestations. A comparison of sequence mosaicism and genome dispersal of young Ya5 paralogs suggests gene conversion as a potential mechanism contributing to 10-20% of subfamily variation and single nucleotide polymorphisms. The Alu middle A-region may also serve as nuclei for sequence expansion and the generation simple sequence repeats.

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