A term used to describe molecules and polyatomic ions that have one atom in the center and six atoms at the corners of a octahedron.
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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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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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The most expensive metal in the world
Do you think the most expensive metal is gold? No! On earth there are more valuable metals. But we need to divide the value of metals that occur in nature, and metals - isotopes, which are obtained in special laboratories. Let’s look at natural metals first.
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Use of diamonds
Diamond is a crystalline modification of pure carbon formed in the deep interior of the Earth, in the upper mantle at depths of more than 80-100 kilometers, at exceptionally high pressure and temperature. It is the most precious stone, the hardest and most wear-resistant mineral, the most...
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Interesting facts about metals
Metals have been used by people since ancient times. All the time the process of obtaining them was improved, useful alloys of various metals appeared. Let’s look at interesting facts about metals.
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Standard Entropy
The absolute entropy of a substance in its standard state at 298 K.
Mother Nuclide
Nuclide that undergoes nuclear decay.
Inner Orbital Complex
Valence bond designation for a complex in which the metal ion utilizes d orbitals for one shell inside the outermost occupied shell in its hybridization.
Positron
A Nuclear particle with the mass of an electron but opposite charge.
Eluate
Solvent (or mobile phase) which passes through a chromatographic column and removes the sample components from the stationary phase.
Voltage
Potential difference between two electrodes, a measure of the chemical potential for a redox reaction to occur.
Continuous Spectrum
Spectrum that contains all wave-lengths in a specified region of the electromagnetic spectrum.
Coke
An impure form of carbon obtained by destructive distillation of coal or petroleum.
Ion
An atom or a group of atoms that carries an electric charge.
Saccharic
of or derived from saccharin or a saccharine substance.
