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The chemistry of substances that contain carbon-hydrogen bonds.

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Electron Configuration

Specific distribution of electrons in atomic orbitals of atoms or ions.

Physical Change

A change in which a substance changes from one physical state to another but no substances with different composition are formed. Example Gas to Liquid - Solid.

 

Forbidden Zone

A relatively large energy separation between an insulator's highest filled electron energy band and the next higher energy vacant band. Beginning in the fourth energy level, a set of seven degenerate orbitals per energy level, higher in energy than s, p, and d orbitals of the same energy level.

Law of Conservation of Energy

Energy cannot be created or destroyed, it may be changed from one form to another.

Double Bond

Covalent bond resulting from the sharing of four electrons (two pairs) between two atoms.

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.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Lewis Base

Any species that can make available a share in an electron pair.

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.

Cation

A positive ion, an atom or group of atoms that has lost one or more electrons.