background preloader

Atomic Weights and Isotopic Compositions for All Elements

Atomic Weights and Isotopic Compositions for All Elements
Related:  Websites

Grand Orbital Table by Manthey Grand Orbital Table All atomic orbitals with n<=10 are presented here. Note that the orbitals with negative m are identical to those with the same magnitude positive m value except for a rotation,and are not shown separately. The orbitals are presented in six different ways, n and l versus m, n and m versus l, l and m versus n, n-l and l-m versus m, n-l and m versus l-m, and l-m and m versus n-l. n and l versus m Return to top of page. n and m versus l l and m versus n n-l and l-m versus m n-l and m versus l-m l-m and m versus n-l Return to Atomic Orbitals or the Site Map.

ThermoDex Select PROPERTIES you are looking for: About ThermoDex | List of Titles Indexed | Finding Thermodynamic Infomation (Guide) | Library Catalog ThermoDex contains records for selected printed and web-based compilations of thermochemical and thermophysical data for chemical compounds and other substances. You can select one or more compound types and link them to one or more property terms, and ThermoDex will return a list of handbooks that could contain these data. Due to copyright and technical considerations, the actual data are not contained in ThermoDex. To use ThermoDex, select multiple properties in the options list on your left, and click Search. Welcome to the new ThermoDex! ThermoDex 4.0 Beta is in the process of an upgrade.

How big is a mole? (Not the animal, the other one.) - Daniel Dulek A comprehensive biography of Avogadro can be found here: The mole is taught in every introductory chemistry class one can take at the college level. Here's an example of a chemistry course: There is an entire day dedicated to commemorating Avogadro's Number. Sparknotes is a great resource for quick learning. "The primary unit for the amount of substance in a chemical element is the mole, and if you are talking about the stoichiometry of a reaction, the mole is the basis for that." Chemistry Crayon Labels set of 48 by QueInteresante

Reversible flow (when I show this in class, minds are blown) | Bilgidrom- Where Knowledge Is Power 12Google + 33StumbleUpon Interesting video showing Laminar Flow and demonstrating fluid flowing in layers. Very cool! 15 Awesome Chemistry GIFs You don’t need to watch Breaking Bad to know that chemistry is pretty awesome. Below, we explore our favorite 15 chemistry GIFs and the science behind them (when we could figure it out): Melting Metal With Magnets The Science: The copper wire has a significant amount of AC electricity running through it, causing it to act like a really strong electromagnet. In the metal slug, eddy currents form due to the magnetic field the copper wire is causing while the copper wire has high frequency AC flowing through it. The metal slug’s electric resistance causes a portion of the electric energy to turn into heat, but the heat builds up until the metal slug becomes white hot and melts. Orange LED Light In Liquid Nitrogen The Science: When an LED is immersed in liquid nitrogen, the electrons lose a lot of thermal energy, even when the light isn’t turned on. Awesome Chemistry GIFs: Heating Mercury Thiocyanate Hydrogen Peroxide Catalyzed By Potassium Iodide

Twelve Free Chemistry Databases Just two years ago, trying to find free online chemistry databases was an exercise in futility. Now, they're sprouting up all over the Web like wildflowers after a wet Spring. What follows is a far-from-complete roundup of some of the more interesting places to start your chemical search. PubChem- The granddaddy of all free chemistry databases. What makes disappearing ink disappear? | 200 Questions About Chemistry Carbon dioxide. A common type of disappearing ink is based on an acid-base indicator called thymolphthalein. This is a molecule that absorbs visible light when it is in an alkaline solution, and becomes colorless in a neutral or acidic solution. Thymophthalein To turn it into a blue ink, we add sodium hydroxide (lye), a strong alkali. But if we allow the ink to soak into paper or cloth, so that there is a lot of surface area in contact with the air, it will absorb carbon dioxide from the air. The neutral solution is no longer blue, but colorless.

Chem Lectures Menu .... Metric Download "Formula Club & Practice Blitzes" in the Summer Assignment Page. We shall next do Unit 6, Equations, here and follow it with unit 5. Unit 6 Equations ..... ..... ..... ..... Unit 7 Stoichiometry ..... ..... ..... Unit 8 Atomic Structure ..... ..... Practice Blitzes "Atomic Structure" (on your FC Blitz Program) Practice Blitzes "Unit 1-8" (on your FC Blitz Program) Unit 9 The Energy of the Electrons ..... ..... Unit 10 Periodic Table ..... ..... ..... ..... ..... ...... Unit 11 is included in Unit 10 Unit 12 Chemical Bonding ..... Unit 13 is included in Unit 12. Unit 14 Polar Molecules and Hydrogen Bonding ..... ..... Unit 15 The Kinetic Theory and Atmospheric Pressure ..... ..... Unit 16 The Solid State and Crystals ..... ..... Unit 17 Equilibrium and the Principle of le Chatelier ..... ..... ........ Practice Blitzes "Kinetic Theory & Equilibrium" (on your FC Blitz Program) Unit 18 Gas Laws, Partial Pressure, Adiabatic Action ..... Unit 19 Gases and the Mole ..... ..... ..... .....

The Chemistry of Glow Sticks Click to enlarge Everyone’s familiar with glow sticks, but it’s likely that fewer are familiar with the chemistry behind their glow. You may have wondered what happens when you snap a glow stick to activate it; by doing this, you’re actually kicking off a chemical process that eventually leads to the production of the coloured light. But how does this process work, and why do you need to bend the glow stick to initiate it? Glow sticks actually contain two separate compartments, with two different chemical solutions. The reaction that takes place is between the hydrogen peroxide solution and the diphenyl oxalate. The exact energy of the light given off is dependent on the structure of the molecule, and this allows different colours to be achieved. You may also have noticed that the packaging of glow sticks often advises that they shouldn’t be cut open. On a final note, glow stick reactions, like many chemical processes, can be influenced by temperature. References & Further Reading

Related: