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  2. 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.

  3. List of compounds with carbon number 3 - Wikipedia

    en.wikipedia.org/wiki/List_of_compounds_with...

    C 3 Cl 3 N 3 O 3: trichloroisocyanuric acid: 87-90-1 C 3 Cl 5 FO: fluoropentachloroacetone: 2378-08-7 C 3 Cl 6: hexachlorocyclopropane: 2065-35-2 C 3 CoNO 4: cobalt tricarbonyl nitrosyl: 14096-82-3 C 3 Cr 7: chromium carbide: 12075-40-0 C 3 F 4: perfluoroallene: 461-68-7 C 3 F 6 O: pentafluoropropionyl fluoride: 422-61-7 C 3 HCl 2 N 3 O 3 ...

  4. Molecular model - Wikipedia

    en.wikipedia.org/wiki/Molecular_model

    The model shown to the left represents a ball-and-stick model of proline. The balls have colours: black represents carbon (C); red, oxygen (O); blue, nitrogen (N); and white, hydrogen (H). Each ball is drilled with as many holes as its conventional valence (C: 4; N: 3; O: 2; H: 1) directed towards the vertices of a tetrahedron. Single bonds are ...

  5. CHNOPS - Wikipedia

    en.wikipedia.org/wiki/CHNOPS

    Graphic representation of carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. CHNOPS and CHON are mnemonic acronyms for the most common elements in living organisms. . "CHON" stands for carbon, hydrogen, oxygen, and nitrogen, which together make up more than 95 percent of the mass of biological system

  6. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    Each distinct atomic number therefore corresponds to a class of atom: these classes are called the chemical elements. [5] The chemical elements are what the periodic table classifies and organizes. Hydrogen is the element with atomic number 1; helium, atomic number 2; lithium, atomic number 3; and so on.

  7. Carbon-based life - Wikipedia

    en.wikipedia.org/wiki/Carbon-based_life

    [2] [3] Because it is lightweight and relatively small in size, carbon molecules are easy for enzymes to manipulate. Carbonic anhydrase is part of this process. Carbon has an atomic number of 6 on the periodic table. The carbon cycle is a biogeochemical cycle that is important in maintaining life on Earth over a long time span.

  8. Oxygen - Wikipedia

    en.wikipedia.org/wiki/Oxygen

    2 combines with atomic oxygen made by the splitting of O 2 by ultraviolet (UV) radiation. [22] Since ozone absorbs strongly in the UV region of the spectrum, the ozone layer of the upper atmosphere functions as a protective radiation shield for the planet. [22] Near the Earth's surface, it is a pollutant formed as a by-product of automobile ...

  9. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbonoxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140 pm length of a typical single C–O bond, and shorter than most other C–O multiply bonded functional groups such as carbonyls. [19]

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