Region or volume in space in which the probability of finding electrons is highest.
Latest Articles
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Why do copper products change color, and what is the name of the process?
Probably, every person wants to know, why over time the copper turns green and becomes bloomed. This is easy to explain: that film is called patina.
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Chemical Safety
People use chemicals every day for a wide array of purposes, which can include work and house hold duties. Many of us fail to realize that we are actually handling potentially deadly chemicals when we simply clean the bathroom or wash the car. This brings to mind the reason why chemical safety is...
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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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Harmful Chemicals Found In Food
It's getting close to New Years and many people are starting to think about how to lose those extra pounds they managed to gain over the holidays. There are many sorts of diets and fads that have developed over the years from cutting carbs to cutting protein. Everyone has their own opinion as to...
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What are Compound Microscopes?
Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is...
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Oxidation Numbers
Arbitrary numbers that can be used as mechanical aids in writing formulas and balancing equations, for single- atom ions they correspond to the charge on the ion, more electronegative atoms are assigned negative oxidation numbers (also called Oxidation states).
Chemical Resources
| Chemindustry.com - Includes chemicals, chemical companies, engineering, and process equipment. Search tool for products, services, and information. |
| Chemicals HeadQuarters - Directory of industrial chemicals and chemical products including induced and forced air coolers, halogenated compounds, distilling equipment, and foundry resins. |
| Chemical Advisory Service - Directories of chemical manufacturers and traders for Australia and New Zealand and chemical manufacturers for the Asia Pacific region. |
| Chemcompass - The database for the chemical industry. Search in over 20,000 products, 2,000 companies, brands, EINECS or CAS-numbers, and detailled company information. |
| Chemical Week - Daily news and product updates for professionals in the chemical industry. |
| American Chemistry Council News and Media - Provides chemistry business and industry news, updated issue briefs, fact sheets, press releases, media contacts and other resources. |
| About Chemistry - News articles, periodic tables, educational resources, newsletters, and annotated links. |
| General Chemistry Online - Rich resource for students and teachers of introductory chemistry. Includes interactive course guides and tutorials, an exam survival guide, reference tables, self-grading quizzes and exams, a searchable glossary, a question and answer board, answers to over 300 frequently asked questions, and a chemical trivia quiz. |
| Chem4Kids - Learn about chemistry including matter, atoms, and reactions. Includes online quizzes. |
| Chemistry & Environmental Dictionary - Contains definitions for many chemistry, environmental and other related technical terms and acronyms. |
| EDF Chemical Scoreboard - Toxic Release Inventory data for the US. Sources and amounts of toxic chemicals released to air and water. Also has information on health effects and other topics. |
| Chemistry Articles - Collection of chemistry and chemical related articles. |
Hund's Rule
All orbitals of a given sublevel must be occupied by single electrons before pairing begins.
Le Chatelier's Principle
States that a system at equilibrium, or striving to attain equilibrium, responds in such a way as to counteract any stress placed upon it.
If a stress (change of conditions) is applied to a system at equilibrium, the system shifts in the direction that reduces stress.
Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
Conduction Band
A partially filled band or a band of vacant energy levels just higher in energy than a filled band, a band within which, or into which, electrons must be promoted to allow electrical conduction to occur in a solid.
Condensation
Liquefaction of vapor.
Standard Reaction
A reaction in which the numbers of moles of reactants shown in the balanced equation, all in their standard states, are completely converted to the numbers of moles of products shown in the balanced equation, also sall at their standard state.
Neutralization
The reaction of an acid with a base to form a salt and water. Usually, the reaction of hydrogen ions with hydrogen ions to form water molecules.
Dynamic Equilibrium
An equilibrium in which processes occur continuously, with no net change. When two (or more) processes occur at the same rate so that no net change occurs.
