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  2. Inorganic compound - Wikipedia

    en.wikipedia.org/wiki/Inorganic_compound

    An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsā  ‍ — ‍ that is, a compound that is not an organic compound. [ 1 ] [ 2 ] The study of inorganic compounds is a subfield of chemistry known as inorganic chemistry .

  3. Molecule - Wikipedia

    en.wikipedia.org/wiki/Molecule

    The smallest molecule is the diatomic hydrogen (H 2), with a bond length of 0.74 Å. [24] Effective molecular radius is the size a molecule displays in solution. [25] [26] The table of permselectivity for different substances contains examples.

  4. Lists of molecules - Wikipedia

    en.wikipedia.org/wiki/Lists_of_molecules

    This is an index of lists of molecules (i.e. by year, number of atoms, etc.). Millions of molecules have existed in the universe since before the formation of Earth. Three of them, carbon dioxide, water and oxygen were necessary for the growth of life.

  5. List of inorganic compounds - Wikipedia

    en.wikipedia.org/wiki/List_of_inorganic_compounds

    (only simple oxides, oxyhalides, and related compounds, not hydroxides, carbonates, acids, or other compounds listed elsewhere) P. Pd Palladium ...

  6. Chemical compound - Wikipedia

    en.wikipedia.org/wiki/Chemical_compound

    [16] [17] [18] A molecule may be homonuclear, that is, it consists of atoms of one chemical element, as with two atoms in the oxygen molecule (O 2); or it may be heteronuclear, a chemical compound composed of more than one element, as with water (two hydrogen atoms and one oxygen atom; H 2 O). A molecule is the smallest unit of a substance that ...

  7. Chemical substance - Wikipedia

    en.wikipedia.org/wiki/Chemical_substance

    All compounds are substances, but not all substances are compounds. A chemical compound can be either atoms bonded together in molecules or crystals in which atoms, molecules or ions form a crystalline lattice. Compounds based primarily on carbon and hydrogen atoms are called organic compounds, and all others are called inorganic compounds.

  8. Diatomic molecule - Wikipedia

    en.wikipedia.org/wiki/Diatomic_molecule

    If a diatomic molecule consists of two atoms of the same element, such as hydrogen (H 2) or oxygen (O 2), then it is said to be homonuclear. Otherwise, if a diatomic molecule consists of two different atoms, such as carbon monoxide (CO) or nitric oxide (NO), the molecule is said to be heteronuclear. The bond in a homonuclear diatomic molecule ...

  9. Hydrocarbon - Wikipedia

    en.wikipedia.org/wiki/Hydrocarbon

    Ball-and-stick model of the methane molecule, CH 4. Methane is part of a homologous series known as the alkanes, which contain single bonds only. In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. [1]: 620 Hydrocarbons are examples of group 14 hydrides.