Hydrocarbon derivative containing an [OH] group bound to an aromatic raing.
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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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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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Ozone
We breathe 24 hours a day, 7 days a week, consuming about 25 kg of air every day. It turns out that we practically predetermine our health by the air we breathe.
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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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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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Neutron
A neutral subatomic particle having a mass of 1.0087 amu.
Octahedral
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.
Heterocyclic Amine
Amine in which the nitrogen is part of a ring.
Voltage
Potential difference between two electrodes, a measure of the chemical potential for a redox reaction to occur.
Homologous Series
A series of compounds in which each member differs from the next by a specific number and kind of atoms.
Allotropic Modifications (Allotropes)
Different forms of the same element in the same physical state.
Raoult's Law
The vapor pressure of a solvent in an ideal solution decreases as its mole fraction decreases.
Element
A substance that cannot be decomposed into simpler substances by chemical means.
Colloid
A heterogeneous mixture in which solute-like particles do not settle out.
Nernst Equation
Corrects standard electrode potentials for nonstandard conditions.
