Compound in which a carbonyl group is bound to two alkyl or two aryl groups, or to one alkyl and one aryl group.
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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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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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Diamonds Are Forever
Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?
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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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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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Periodicity
Regular periodic variations of properties of elements with atomic number (and position in the periodic table).
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.
Matter
Anything that has mass and occupies space.
Group
A vertical column in the periodic table, also called a family.
Water Equivalent
The amount of water that would absorb the same amount of heat as the calorimeter per degree temperature increase.
Valence Electrons
Outermost electrons of atoms, usually those involved in bonding.
Molecular Orbital Theory
A theory of chemical bonding based upon the postulated existence of molecular orbitals.
Geometrical Isomers
Compounds with different arrangements of groups on either side of a bond with restricted rotation, such as a double bond or a single bond in a ring, for example cis-trans isomers of certain alkenes. Stereoisomers that are not mirror images of each other, also known as position isomers.
Excited State
Any state other than the ground state of an atom or molecule.
Effective Collisons
Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.
