Representation of the core of a molecule, ion or formula unit by showing atomic symbols and only outer shell electrons.
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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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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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Features of the Scanning Tunneling Microscope
The scanning tunneling microscope (STM) invented by Heinrich Rohrer and Gerd Binnig in the 1980s still manages to do a great job today and competes with more advanced microscope types. The scanning tunneling microscope is used for studying the surface atoms that are found on various materials. The...
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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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Gas of rotten eggs
If you happen to break a rotten egg, then you know the smell of hydrogen sulfide, because the stench of the spoiled egg depends on of its presence in rotting protein substances.
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Phosphorus Oxychloride
Colorless to slightly yellow fuming liquid.
Mol. Wt.: 153.39
M.P.: 20C
B.P.: 105.1C
Density: 1.685 @ 15.5C
Vapor Pressure: 40 mm @ 27.3C
Vapor Density: 5.3
Used as the phosphorus source for phosphorus diffusion.
Calorimeter
A device used to measure the heat transfer between system and surroundings.
Solubility Product Constant
Equilibrium constant that applies to the dissolution of a slightly soluble compound.
Polyene
A compound that contains more than one double bond per molecule.
Ion
An atom or a group of atoms that carries an electric charge.
Mechanism
The sequence of steps by which reactants are converted into products.
Downs Cell
Electrolytic cell for the commercial electrolysis of molten sodium chloride. For further information see Electrochemistry or Fuel Cells.
Energy
The capacity to do work or transfer heat.
Law of Conservation of Energy
Energy cannot be created or destroyed, it may be changed from one form to another.
Polarization
The buildup of a product of oxidation or a reduction of an electrode, preventing further reaction.
