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  2. Molecule - Wikipedia

    en.wikipedia.org/wiki/Molecule

    The study of molecules by molecular physics and theoretical chemistry is largely based on quantum mechanics and is essential for the understanding of the chemical bond. The simplest of molecules is the hydrogen molecule-ion, H 2 +, and the simplest of all the chemical bonds is the one-electron bond.

  3. Chemistry - Wikipedia

    en.wikipedia.org/wiki/Chemistry

    Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.

  4. Chemical bond - Wikipedia

    en.wikipedia.org/wiki/Chemical_bond

    The types of strong bond differ due to the difference in electronegativity of the constituent elements. Electronegativity is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond, where the higher the associated electronegativity then the more it attracts electrons.

  5. Chemical species - Wikipedia

    en.wikipedia.org/wiki/Chemical_species

    Atomic species: Specific form of an element defined by the atom's isotope, electronic or oxidation state. Argon is an atomic species of formula Ar. [5] Molecular species: Groups of atoms that are held together by chemical bonds. An example is ozone, which has the chemical formula O 3. [6]

  6. Hansen solubility parameter - Wikipedia

    en.wikipedia.org/wiki/Hansen_solubility_parameter

    Bonding between molecules is more subtle than the three parameters suggest. Molecular shape is relevant, as are other types of bonding such as induced dipole, metallic and electrostatic interactions. The size of the molecules also plays a significant role in whether two molecules actually dissolve in a given period. The parameters are hard to ...

  7. Chemical compound - Wikipedia

    en.wikipedia.org/wiki/Chemical_compound

    The differences in the types of bonds in compounds differ based on the types of elements present in the compound. London dispersion forces are the weakest force of all intermolecular forces . They are temporary attractive forces that form when the electrons in two adjacent atoms are positioned so that they create a temporary dipole .

  8. Lewis structure - Wikipedia

    en.wikipedia.org/wiki/Lewis_structure

    For some molecules and ions, it is difficult to determine which lone pairs should be moved to form double or triple bonds, and two or more different resonance structures may be written for the same molecule or ion. In such cases it is usual to write all of them with two-way arrows in between (see § Example below). This is sometimes the case ...

  9. Structural formula - Wikipedia

    en.wikipedia.org/wiki/Structural_formula

    Skeletal structural formula of Vitamin B 12.Many organic molecules are too complicated to be specified by a molecular formula.. The structural formula of a chemical compound is a graphic representation of the molecular structure (determined by structural chemistry methods), showing how the atoms are connected to one another. [1]

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