81. ThinkQuest Library Of Entries Silicon, Si(s), 0, 18.83, 0. SiBr 4 (l), 457.3, 277.8, -443.9. SiC(s), -65.3,16.61, -62.8. SOCl 2 (g), -212.5, 309.77, -198.3. H 2 SO 4 (l), -813.989, 156.904,-690.003. http://library.thinkquest.org/C004970/reference/thermo3.htm

Welcome to the ThinkQuest Internet Challenge of Entries The web site you have requested, The Net Equation , is one of over 4000 student created entries in our Library. Before using our Library, please be sure that you have read and agreed to our To learn more about ThinkQuest. You can browse other ThinkQuest Library Entries To proceed to The Net Equation click here Back to the Previous Page The Site you have Requested ... The Net Equation click here to view this site A ThinkQuest Internet Challenge 2000 Entry Click image for the Site Site Desciption The Net Equation is an online chemistry resource. A textbook onlineand more! This site provides an in-depth look at chemistry, covering a large variety of topics in a way that makes learning easy, while also focusing on specific areas that are important for Advanced Placement students who plan on taking the AP test for college credit. Special features of this site include a message board for posting ideas and questions, a click-and-view Periodic Table of Elements in a convenient separate window, and interviews (in text AND audio) of real-life chemistry professionals. Students Darren Woodinville High School WA, United States

82. ThinkQuest Library Of Entries H + (g), 1536.202, , . H 2 O(l), -285.830, 69.91, -237.129. H 2 O(g), -241.818,188.825, -228.572. H 2 O 2 (l), -187.78, 109.6, -120.35. Iodine, I 2 (s), 0, 116.135,0. http://library.thinkquest.org/C004970/reference/thermo2.htm

Welcome to the ThinkQuest Internet Challenge of Entries The web site you have requested, The Net Equation , is one of over 4000 student created entries in our Library. Before using our Library, please be sure that you have read and agreed to our To learn more about ThinkQuest. You can browse other ThinkQuest Library Entries To proceed to The Net Equation click here Back to the Previous Page The Site you have Requested ... The Net Equation click here to view this site A ThinkQuest Internet Challenge 2000 Entry Click image for the Site Site Desciption The Net Equation is an online chemistry resource. A textbook onlineand more! This site provides an in-depth look at chemistry, covering a large variety of topics in a way that makes learning easy, while also focusing on specific areas that are important for Advanced Placement students who plan on taking the AP test for college credit. Special features of this site include a message board for posting ideas and questions, a click-and-view Periodic Table of Elements in a convenient separate window, and interviews (in text AND audio) of real-life chemistry professionals. Students Darren Woodinville High School WA, United States

83. Chemistry 115 Exam 3 Summer 1996 chemistry 115 Exam III. affinity of nitrogen is approximately zero, while the elementson either is 89.8 kJ/mol, the enthalpy of vaporization of Br(l) is 111.88 http://chemed.chem.purdue.edu/chem115/tests/exam3sum96.html

Chemistry 115 Exam III Summer 1996 Directions This exam consists of 10 pages, including this cover page and a periodic table. Make sure that you have one copy of each page. There are 16 multiple-choice questions on this exam worth 6 points each. There is one best answer to each question. Chose the best answer to each question and enter it on the exam. There are 6 fill-in-the-blank questions worth 10 points each. Partial credit will be given for these questions if you show your work . (N.B.: The TAs won't turn over the exam pages, to look for information written on the back, unless you tell them to!) Potentially Useless Information Avogadro's number = 6.022045 x 10 = h/(mv) electron mass = 9.10953 x 10 kg c = neutron mass = 1.67252 x 10 kg E = h proton mass = 1.67495 x 10 kg c = 3.00 X 10 m/s E hv = B.E.+K.E h = 6.623 X 10 Js E = R H [(l/n i (l/n f R H = -2.18 X 10 J Multiple-Choice Questions: 1. Which set contains the types of radiation listed in the proper order with respect to wavelength? (e) None of the above. 2. What is the wavelength of a photon emitted during an electronic transition from the n = 3 to n =2 state in the hydrogen atom. (b) 6.2 x 10

84. I - Glossary Of Chemical Terms to reserve the word nuclide for a species of specific Z and A International Unionof Pure and Applied chemistry (IUPAC) is a voluntary nonprofit association of http://www.ktf-split.hr/periodni/en/abc/i.html

KTF-SPLIT EniG. I ideal gas ideal gas law ideal solution index of refraction ... IUPAC My Software FACULTY OF CHEMICAL TECHNOLOGY PERIODIC TABLE OF THE ELEMENTS A B ... Z Glossary of chemical terms ideal gas Ideal gas is a gas in which there is complete absence of cohesive forces between the component molecules; the behavior of such a gas can be predicted accurately by the ideal gas equation through all ranges of temperature and pressure. The concept is theoretical, since no actual gas meets the ideal requirement. ideal gas law The generalized ideal gas law is derived from a combination of the laws of Boyle and Charles. Ideal gas law is the equation of state pV RT which defines an ideal gas, where p is pressure, V molar volume, T temperature, and R the molar gas constant (8.314 JK mol ideal solution Ideal solution is a solution in which solvent-solvent and solvent-solute interactions are identical, so that properties such as volume and enthalpy are exactly additive. Ideal solutions follow Raoult's law, which states that the vapor pressure p i of component i is p i x i p i , where x i is the mole fraction of component i and p i the vapor pressure of the pure substance i.

85. Entrez-PubMed for the most widely cultivated subspecies in China, Oryza sativa L. ssp. DNA TransposableElements; DNA, Intergenic; DNA, Plant/genetics; DNA, Plant/chemistry; http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1

86. Academic Bibliography For Kempenaers, Lieven Microheterogeneity study of trace elements in BCR In Fresenius' journal of analyticalchemistry, 369(2001 Kempenaers L., Vincze L., Janssens K.. - The use of http://lib.ua.ac.be/AB/a22516.html

Kempenaers, Lieven Go to the STARTSCREEN The author belongs to: UIA Departement Scheikunde Years: Vekemans B. Vincze L. Somogyi A. Drakopoulos M. Kempenaers L. Simionovici A. Adams F. Quantitative X-ray fluorescence analysis at the ESRF ID18F microprobe. - In: Nuclear instruments and methods: B , 199(2003), p. 396-401 Kempenaers L. Janssens K. Vincze L. Vekemans B. Somogyi A. Drakopoulos M. Simionovici A. Adams F. A Monte Carlo model for studying the microheterogeneity of trace elements in reference materials by means of synchrotron microscopic X-ray fluorescence. - In: Analytical chemistry , 74:19(2002), p. 5017-5026 Kempenaers L. De Koster C. Van Borm W. Janssens K. Micro-heterogeneity study of trace elements in BCR CRM 680 by means of synchrotron micro-XRF. - In: Fresenius' journal of analytical chemistry , 369(2001), p. 733-737 Kempenaers L. Bings N.H. Jeffries T.E. Vekemans B. Janssens K. The use of LA-ICP-MS for the characterization of the micro-heterogeneity of heavy metals in BCR CRM 680. - In: Journal of analytical atomic spectrometry , 16:9(2001), p. 1006-1011

87. Search Minerals By Chemistry The web's most comprehensive and regularly updated mineralogy database with information on minerals from around the world and thousands of photos meta name= http://www.mindat.org/chemsearch.php

Main Menu Log In Message Board Event List ... Statistics Search by Elements Click on an element to select or deselect. Return IMA-approved species only Click on an element to select it (matches MUST INCLUDE this element). Click again to mark it as excluded (matches MUST NOT INCLUDE it) Noble gasses and elements not stable in nature are excluded. Hit one of the Search buttons when done. For more information about the periodic table, click here to visit the excelllent webelements.com site Minerals: A B C D ... Z or find: Localities: A B C D ... Z or find: Photos: A B C D ... Z Further information contact the webmaster. Mysterious Ways More websites

88. Quantum Numbers And The Periodic Table for any given values of n and l , there can goes into the leftmost column (for thoseelements with only Physics for Students of Biology and chemistry home page http://www.rwc.uc.edu/koehler/biophys/6b.html

Quantum Numbers and the Periodic Table We have seen that the energies of bound electrons are quantized , and have labelled the energy levels with an integer n. We mentioned that the orbits are not necessarily circular, nor are they planar. Instead, they are three dimensional, so that instead of circular, we have spherical, and instead of elliptical, we have ellipsoidal. In fact, the energy of an atomic electron depends not only on n, but on angular momentum, orientation, and spin as well. These effects are not predicted by the Bohr model, but derive from the more advanced (and complicated!) Schrodinger and Dirac Equations. We therefore "label" an atomic electron by four "quantum numbers": n = 1, 2, 3, ...., denoting energy; l = 0, 1, ..., n-1, denoting angular momentum m = - l l , denoting orientation (the "magnetic quantum number"), s = -1/2, 1/2, denoting spin (m s is also used in place of s). The set of four numbers (n, l , m,s) identifies the "quantum state" of the electron. Chemists use letters in place of numbers for l (s, p, d, f, etc.), and so an n=3

89. The Chemistry Site: Atomic Structure Practice Problems E = (Z 2 / n 2 ) * 1310 kJ/mol = -( 3 2 / 1 2 ) * 1310 kJ/mol = 1.18* 10 2 kJ. 7.) l = h/mv (v is velocity, not frequency) (m in kg). http://chem.neopages.com/practice/ats.shtml

new ypSlideOutMenu("menu1", "down", 161, 178, 200, 450) new ypSlideOutMenu("menu2", "down", 161, 259, 200, 450) new ypSlideOutMenu("menu3", "down", 161, 327, 200, 450) new ypSlideOutMenu("menu4", "down", 161, 385, 200, 450) new ypSlideOutMenu("menu5", "down", 161, 432, 200, 450) new ypSlideOutMenu("menu6", "down", 161, 520, 200, 450) Home News About Us Contact Us ... Thermodynamic Data Atomic Structure Practice Problems Calculate the frquency of red light of wavelength 6.50 * 10 nm 6.42 * 10-19 J of energy is required to remove an electron from a silver atom. What is the maximum wavelength of light that can do this? Calculate the D E when the following transition occurs in a hydrogen atom: Calculate the wave length of light emitted as a hydrogen electron move from n = 1 to n = 3 Give the quantum numbers l, m l , and the number of orbitals for n = 4 Give the electron configurations for: a.) Sr b.) Pt c.) S Calculate the ionization energy of the Li ion with the electron in its ground state. Find the wavelength emitted from an electron (m = 9.11 * 10

90. ChemIndustry.com Categories A To Z surface treatment Columns, L / L separation Combinatorial Photographic chemicals Physicalchemistry Physical measuring metal Piping elements, samplers Plastic http://www.chemindustry.com/db/category/allcats.asp

ChemIndustry.com categories A to Z Absorbents, ion exchange Academic Institutes Advanced materials Agitators, liquid mixers ... Recommend ChemIndustry.com to your friends. Home Advertising Job Opportunities Newsletter ... Deutsch

91. Papers (JPO to 1st International Conference on the chemistry and Physics of the TranscatinideElements, TAN'99 JP Omtvedt, EA Hult, L. Stavsetra and the SISAK http://folk.uio.no/jonpo/papers.html

Publications Journal articles: As", Z. Phys A J.P. Omtvedt, P. Hoff, B. Fogelberg: "The decay of As", Z. Phys A Ge and As", Z. Phys. A H. Grawe, P. Hoff, J.P. Omtvedt, K. Steffensen, R. Eder, H. Haas, H. Ravn, and the ISOLDE Collaboration: "Study of the -/EC decay of the neutron deficient Nuclei Sr and Y". Z. Phys A Sn: First observation of octopole collectivity" Phys. Rev. Lett. Sn and it's neighbours; Perspective for further studies at PIAFE", Invited talk at the International Symposium on Physics of Unstable Nuclei, Niigata, Japan, Oct. 31 - Nov. 3, 1994. Nucl. Phys. Sn: Collectivity and p-h States", Physica Scripta. J. P. Omtvedt: "Yggdrasil - a program for fast, interactive -coincidence analysis on small computers (PCs)", Nucl. Instr. Methods Sb", Phys. Rev. Sn region", Phys. Rev. Lett. Te: Low spin states observed in the decay of Sb", Phys. Rev. Rh", Eur. Phys. J. Te populated in the decay of 7 Sb", submittet to Nucl. Phys. R. Malmbeck, G. Skarnemark, J. Alstad, K. Fure, M. Johansson, J.P. Omtvedt: "A Chemical Separation Procedure Proposed for Studies of Bohrium", in preparation. Conference papers: J.P. Omtvedt, K. Fure, J. Alstad, J.E. Dyve, E.A. Hult, M. Johansson, L. Stavsetra: "A SISAK three-stage separation system for chemical studies of Bh, element 107" submitted to 1st International Conference on the Chemistry and Physics of the Transcatinide Elements, TAN'99, Seeheim, Germany, September 1999.

92. Basic Keyword List top A B C D E F G H I J K L M N O P Q R S T U V W X Y Z top. Barium, Elementsand Element Groups. Basicity, Physical chemistry and Chemical Physics. http://www.wiley-vch.de/vch/journals/keyword.php?sort=e

93. Navigation the main interests were carbohydrate and peptide chemistry. The structure elementsof philanthotoxins comprise a L. and Phlomis herbaventis L. Z. Naturforsch. http://www.dfh.dk/instm/forskning/npcgroup/staff/hf.htm

Henrik Franzyk Associate professor Department of Medicinal Chemistry Royal Danish School of Pharmacy Universitetsparken 2 DK-2100 Copenhagen Denmark Phone: (+45) 35 30 62 55 Fax: (+45) 35 30 60 40 E-mail: hf@dfh.dk Location: Department of Medicinal Chemistry Building 30, Jagtvej 162, room 136 Curriculum vitae Education: M. Sci. Engineering (chemistry), (Cand. polyt.) 1991 Ph.D. (Natural Products Chemistry) 1993 Researcher at Fef Chemicals 1993 Post doc at Carlsberg Laboratory 1994-1996 Research assistant professor at Dept. Organic Chemistry, Danish Technical University (DTU) 1996-1997 Post doc at Colorado State University, Fort Collins 1997 Research associate professor at Dept. Organic Chemistry, Danish Technical University (DTU) 1998-2000 Associate professor at Dept. Medicinal Chemistry, Royal Danish School of Pharmacy Research interests Bioactivity and Medicinal Chemistry of Natural Products During the Ph.D. study, biosynthesis and chemotaxonomy of secoiridoid glucosides (a class of monoterpenoids) were investigated. This included semi-syntheses of deuterium-labelled precursors, biosynthetic feeding experiments and determination of incorporation in the isolated metabolites by 2H NMR spectroscopy. The biosynthetic pathways were examined in species of the Olive family. In addition, the structures of several novel iridoid glucosides and phenylpropanoids were determined.

94. Crystal Chemistry Tulane University, Mineralogy. Crystal chemistry. Atoms. Atoms make up the chemicalelements. Each chemical element has nearly identical atoms. Value of l, 1, 2, 3, 4. http://www.tulane.edu/~sanelson/geol211/crystal_chemistry.htm

Prof. Stephen A. Nelson Geology 211 Tulane University Mineralogy Crystal Chemistry As we have been discussing for the last several weeks, crystals, and thus minerals, are made up of a 3-dimensional array of atoms arranged in an orderly fashion. Now we explore what these atoms are and how they interact with one another to determine the physical and structural properties of crystals. So, first we explore the properties of the atom. Atoms Atoms make up the chemical elements. Each chemical element has nearly identical atoms. An atom is composed of three different particles: Protons positively charged, reside in the center of the atom called the nucleus. Electrons negatively charged, orbit in a cloud around nucleus. Neutrons no charge, reside in the nucleus. In a neutrally charged atom, each element has the same number of protons and the same number of electrons. Number of protons = Number of electrons. Number of protons = atomic number Number of protons + Number of neutrons = atomic weight Isotopes are atoms of the same element with differing numbers of neutrons. i.e. the number of neutrons may vary within atoms of the same element. Some isotopes are unstable which results in radioactivity.

95. Depositing Data With The CCDC Depositing Data with the CCDC. http://www.ccdc.cam.ac.uk/conts/depositing.html

Depositing Data with the CCDC Method CCDC Numbers Private Communications Depositing Data Preferred format is CIF which should be sent as a plain text ASCII file to: deposit@ccdc.cam.ac.uk Please send any questions, comments or suggestions about deposition and retrieval of data to this email address. Help with required data items for deposition is available. The receipt of your data will be acknowledged, usually within 3 working days, with a summary report containing a CCDC deposition number, e.g. CCDC 175025. Please include this number as a footnote in your paper, as it may be required by those journals who have entered into a deposition scheme with the CCDC. A list of frequently asked questions - FAQs concerning deposition of data with the CCDC is available Note: Data associated with polypeptide and polysaccharide structures, having more than 24 units, should be directed to the Protein Data Bank . Inorganic datasets should be directed to the Inorganic Crystal Structure Database CCDC Deposition Numbers Journals involved in deposition schemes with the CCDC are: A - D E - H I - L M - P ... U - Z A - D Advanced Functional Materials Advanced Materials Advanced Materials for Optics and Electronics Angewandte Chemie, International Edition in English

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