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Links: Reference Sources
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Reference Sources
The TeleSpec Infrared Spectra Database
A continually updated database of IR spectra for compounds containing C, H, O, N, and halogen atoms. Free, although registration is required.
Periodic Tables
Web Elements
Periodic table plus description of each element's chemical and physical properties with supporting tables.
The Elements and Isotopes
The Elements and Isotopes is a comprehensive application that will display information from the Periodic Table and the Table of the Isotopes.
Periodic Table
Standard information is available for each element such as: density, boiling and melting points, covalent and atomic radii, valences, electronegativity, ionization energy, electron configurations...…
Periodic Table of the Elements
Click on an element in the periodic table and receive information on that element's history, sources, compounds that it forms, uses, costs, the isotopes it forms…
Periodic Table Data base
Includes about a dozen physical properties such as boiling and melting point,, density, thermal conductivity, and specific heat capacity.
MIT Periodic Table
Good for investigating periodic properties. A graph of the selected property versus atomic number is available for each element.
Los Alamos Periodic Table
Description of history, properties, resources, uses, isotopes, forms, costs... for each element.
Chemicool
Periodic Table of the Elements, with a legend describing each element . Click on an element of interest and get data on its density, boiling point, melting point, heat of fusion, ionization energies, electron configuration, physical and chemical properties, abundance, atomic radius, isotopes…
Java Periodic Table of the Elements
Click on a physical property of choice and a graph of that physical property versus atomic weight is displayed. Next, click on an element of choice and the value of the physical property for the selected element is given.
Lenntech Periodic Table
This site differs from other periodic table sites in that is carries health and envrionmental effects for the most important elements. The periodic table is presented in 5 languages
Data Tables and Physical Constants
Vapor Pressure of Water
The table of vapor pressure data for water is given in kPa. Conversion factors given for conversion of pressure to atm or mm Hg.
Tables of Chemical Data
Tables of fundamental physical constants, thermodynamic properties of pure substances, ionization constants of monoprotic and polyprotic acids, solubility products, stability constants, aqueous standard reduction potentials....
Table of the Nuclides
Included for each nuclide: atomic mass, binding energy,atomic abundance, half-life, possible parent nuclides...
Physical Constants
Tables of physical constants for chemistry and physics.
Table of Common Ions
Names, formulae, and charges of some common ions.
Nuclear Science
Not the easier site to navigate but filled with reference information including a periodic table of the nuclides, nuclear science and astrophysics glossaries, and descriptions of nine nuclear science experiments. But in particular check out the section: Learn about Nuclear Science. The discussion/explanation and the graphics are excellent. Use the links in the middle of the webpage.
Half-Lives of Selected Radioactive Isotopes
A table of 41 isotopes with their half-lives plus an explanation of C14 dating.
CHEMystery Reference
Physical constants, solubilities, densities, oxidation states, reduction potentials, discussions of various topics in beginning chemistry.
Calculations and Conversions
Ideal Gas Law Calculator
Solves Ideal Gas Law Equation when three of the variables are known.
Ideal Gas Calculator
For the four variables in the ideal gas law equation: pressure p, volume v, temperature T, or number of moles n, enter data for three of the variables and the program calculates the value of the fourth.
Conversion Factor Calculator
Converts between units in chemistry, physics, engineering...
Concentration Units
Describes parts per million PPM, parts per billion PPB, parts per trillion PPT, and parts per quidrillion PPQ in mathematical AND in understandable terms.
Chemical Composition
Enter a chemical formula and the percentages of each of the elements included in the formula is calculated. First step in calculation of empirical formula.
Chemfinder
Enter the name, chemical formula, or molecular formula of a chemical and get its description plus chemical and physical properties.
NIST WebBook
Determine the chemical identity of a sample by entering formula, name, molecular weight, IR data, mass spect data, or by using the on site applet to draw a structure.
Molecular Weight Calculator
Molecular mass is calculated and displayed when a chemical formula is entered.
Open
Quizzes and Tutorials
A set of 15 test banks with answers covering topics such as: atoms and molecules, chemical equations, thermochemistry, quantum chemistry, molecular geometry, bonding, gaseous state, solutions, rate of reactions, acids and bases, equilibrium, solubility, entropy, and electrochemistry. Each test bank is futher broken down into about 10-15 sub-categories which facilitates concentration on a topic of interest. Very comprehensive.
Chemical Names and Nomenclature
ACD/Name
Generate systematic names from chemical structures, and structures from systematic or common names with the click of a button. Freeware version available for download.
Acronym Database
Search for chemical name for common chemicals such as PVC that is formed from the initial letters of the words of a compound term: polyvinyl chloride.
Basic Organic Nomenclature
Includes alkanes, aromatics, functional groups...
Common Names
A table of synonyms for many common chemicals; for example Borax and sodium tetraborate
Molecules with Silly Names
Description and structure of molecules such as: arsole, bastardane, megaphone, buckminster fullerene, munchnones. Click on MOTM Bristol and scrool to the bottom of the page.
Definitions
Chemistry Definitions
A "textbook" of chemistry definitions accessible by subject category.
Chemistry Dictionary
Contains definitions of chemical terms.
Definitions and terms in Organic Chemistry
A dictionary of preferred definitions and terms in Organic Chemistry.
What is a Mole?
A history of the development of the mole concept. Easy reading.
Textbook
Biochemistry Lecture Notes
Outline notes for a introductory level university biochemistry course. The first chapter provides an overview of the topic plus succinct coverages of bonding and aqueous solution chemistry. Later chapters cover proteins, enzymes, metabolism, carbohydrates, amino acid biosythesis and degradation, the Urea Cycle...
Friends School Chemistry Homepage
A database of links to on-site definitions and short explanations. The text and the accompanying graphics are clear and to the point. The range of topics is limited but the those included are treated thoroughly. Hopefully, this is a work in progress and additional topics will be forthcoming. An excellent site for beginning chemistry students.
Intro to Chem II
On-site links to traditional textbook treatment of second semester topics such as: thermodynamics, electrochemistry, chemical kinetics, transition metal chemistry. Mostly definitions with no illustrations.
Introductory Organic Chemistry
Almost exclusively presented in narrative form with almost no graphics or links. A good source for basic topics such as alkanes, alkynes, aromatics, heterocylics,and functional groups but also includes sections on petroleum, pesticides and dyes under fine chemicals, lipids, molecular genetics…
Laboratory Help
Graphing
Basic tutorial for graphing experimental data. Includes a plot of data taken from a table, interpretation of resulting graph, calculation of constants…
Laboratory Practices
Includes sections on writing laboratory reports and on laboratory safety.
Specific Databases
ACD/Chromatography Applications Database
The free Public Chromatography Applications Database under ACD/Web Librarian contains 1830 HPLC/GC separations provided by major column vendors. The database can be searched by structure, substructure, and structural similarity, as well as by numerous chromatographic parameters.
Abbreviations of Chemical Compounds
Type in an abbreviation of the name of a chemical compound and get its full name, chemical name, and structure.
Amino Acid Database
Structure and basic data given for amino acids.
CCD ChemExper Chemical Directory
A search engine that allows a chemical to be found by submitting its molecular formula, IUPAC name, common name, CAS number, catalog number, substructure or physical characteristics. Really useful for determining the number and identity of all the isomers for a particular molecular formula.
ChemDex
General index of Links to University chemistry departments world wide, chemical companies worldwide, databases...
Smell Database
Smell, physical properties, and structure (wire-frame and space) representations. Rotating molecule is available using RasMol software.
Odds and Ends