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  2. Oxygen - Wikipedia

    en.wikipedia.org/wiki/Oxygen

    Oxygen also acts as a ligand for transition metals, forming transition metal dioxygen complexes, which feature metal– O 2. This class of compounds includes the heme proteins hemoglobin and myoglobin. [131] An exotic and unusual reaction occurs with PtF 6, which oxidizes oxygen to give O 2 + PtF 6 −, dioxygenyl hexafluoroplatinate. [132]

  3. Chemical formula - Wikipedia

    en.wikipedia.org/wiki/Chemical_formula

    They are the same as empirical formulae for molecules that only have one atom of a particular type, but otherwise may have larger numbers. An example of the difference is the empirical formula for glucose, which is CH 2 O (ratio 1:2:1), while its molecular formula is C 6 H 12 O 6 (number of atoms 6:12:6). For water, both formulae are H 2 O. A ...

  4. Allotropes of oxygen - Wikipedia

    en.wikipedia.org/wiki/Allotropes_of_oxygen

    Triatomic oxygen (ozone, O 3) is a very reactive allotrope of oxygen that is a pale blue gas at standard temperature and pressure. Liquid and solid O 3 have a deeper blue color than ordinary O 2, and they are unstable and explosive. [5] [6] In its gas phase, ozone is destructive to materials like rubber and fabric and is damaging to lung tissue ...

  5. Singlet oxygen - Wikipedia

    en.wikipedia.org/wiki/Singlet_oxygen

    Abbreviations, step 1: H 2 O 2, hydrogen peroxide; Na 2 MoO 4 (catalyst), sodium molybdate. Step 2: Na 2 SO 3 (reducing agent), sodium sulfite. Because of differences in their electron shells, singlet and triplet oxygen differ in their chemical properties; singlet oxygen is highly reactive. [26] The lifetime of singlet oxygen depends on the ...

  6. Atomicity (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Atomicity_(chemistry)

    Atomicity is the total number of atoms present in a molecule of an element. For example, each molecule of oxygen (O 2) is composed of two oxygen atoms.Therefore, the atomicity of oxygen is 2.

  7. Lewis structure - Wikipedia

    en.wikipedia.org/wiki/Lewis_structure

    Nitrogen is the least electronegative atom of the two, so it is the central atom by multiple criteria. Count valence electrons. Nitrogen has 5 valence electrons; each oxygen has 6, for a total of (6 × 2) + 5 = 17. The ion has a charge of −1, which indicates an extra electron, so the total number of electrons is 18. Connect the atoms by ...

  8. Glossary of chemical formulae - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemical_formulae

    C 6 H 14 N 2 O 2: lysine Lys: 56-87-1 N-Methylornithine: 3485-66-3 C 6 H 14 N 4 O 2: arginine Arg: 74-79-3 C 6 H 14 O 2: 1,6-hexanediol: C 6 H 14 O 3: dipropylene glycol: C 6 H 14 O 3: trimethylolpropane: C 6 H 14 O 4: triethylene glycol: C 6 H 15 NO 3: triethanolamine: C 6 H 7 N 3 O 3: 2-Oxohistidine: 181996-08-7 C 6 N 4: tetracyanoethylene: C ...

  9. Chemical equation - Wikipedia

    en.wikipedia.org/wiki/Chemical_equation

    A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and chemical formulas.The reactant entities are given on the left-hand side and the product entities are on the right-hand side with a plus sign between the entities in both the reactants and the products, and an arrow that points towards the products to show the direction of the reaction. [1]