The temperature at which liquid and solid coexist in equilibrium, also the freezing point.
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| Chemindustry.com - Includes chemicals, chemical companies, engineering, and process equipment. Search tool for products, services, and information. |
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| 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. |
Native State
Refers to the occurrence of an element in an uncombined or free state in nature.
Solvent
The dispersing medium of a solution.
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.
Liquid Aerosol
Colloidal suspension of liquid in gas.
Haber Process
A process for the catalyzed industrial production of ammonia from N2 and H2 at high temperature and pressure.
Aryl Group
Group of atoms remaining after a hydrogen atom is removed from the aromatic system.
Sigma Bonds
Bonds resulting from the head-on overlap of atomic orbitals, in which the region of electron sharing is along and (cylindrically) symmetrical to the imaginary line connecting the bonded atoms.
Canal Ray
Stream of positively charged particles (cations) that moves toward the negative electrode in cathode ray tubes, observed to pass through canals in the negative electrode.
Periodicity
Regular periodic variations of properties of elements with atomic number (and position in the periodic table).
