Chemazone - Online Catalog - Millions of Stocked Compounds

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Chemazone - Online Catalog - Millions of Stocked Compounds.
A chemical compound is a substance consisting of two or more atoms connected by a chemical bond. Organic chemical compounds are described in the section organic chemistry.
The molecule.
Different atoms can connect with each other and form complex compounds - molecules. An example of a molecule can be H2O - water, HCl - hydrochloric acid or H2SO4 - sulfuric acid. When two atoms are at close distance, their electron clouds can overlap and form a compound - a molecule, while the nuclei of the atoms will be inside one electron cloud.
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At a great distance the atoms do not interact with each other, at some distance the atoms are attracted to each other and at very close distances the atoms repel. At some point, the forces of repulsion and attraction are balanced and the atoms can combine into a molecule. The formation of a bond is mainly influenced by the electronic configuration of each of the atoms. The fact is that each electron moves along a certain orbital, i.e. it has a certain level of energy. The formation of a bond between atoms means the creation of common electronic orbitals, i.e. other, new energy levels are being created, along which electrons move.
Molecular orbitals.
Molecular orbitals are a method for determining the configuration of the electron shell of a molecule, as well as its properties. At each energy level of the molecular orbital, as well as on the atomic orbital, there are two electrons. In this case, the levels are formed so that the first strengthens the bond between the atoms, and the next one weakens (loosens) the bond.