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  2. Molecular orbital diagram - Wikipedia

    en.wikipedia.org/wiki/Molecular_orbital_diagram

    The two hydrogen 1s orbitals are premixed to form a 1 (σ) and b 2 (σ*) MO. Mixing takes place between same-symmetry orbitals of comparable energy resulting a new set of MO's for water: 2a 1 MO from mixing of the oxygen 2s AO and the hydrogen σ MO. 1b 2 MO from mixing of the oxygen 2p y AO and the hydrogen σ* MO. 3a 1 MO from mixing of the a ...

  3. Two-stroke oil - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_oil

    The oil is dyed blue to make it easier to recognize in the gasoline. It appears black in this bottle because it is not diluted. Two-stroke oil (also referred to as two-cycle oil, 2-cycle oil, 2T oil, or 2-stroke oil) is a special type of motor oil intended for use in crankcase compression two-stroke engines, typical of small gasoline-powered ...

  4. Molecular orbital - Wikipedia

    en.wikipedia.org/wiki/Molecular_orbital

    Within a particular representation, the symmetry-adapted atomic orbitals mix more if their atomic energy levels are closer. The general procedure for constructing a molecular orbital diagram for a reasonably simple molecule can be summarized as follows: 1. Assign a point group to the molecule. 2. Look up the shapes of the SALCs. 3.

  5. Molecular orbital theory - Wikipedia

    en.wikipedia.org/wiki/Molecular_orbital_theory

    Molecular orbital diagram of He 2 Bond order is the number of chemical bonds between a pair of atoms. The bond order of a molecule can be calculated by subtracting the number of electrons in anti-bonding orbitals from the number of bonding orbitals, and the resulting number is then divided by two.

  6. Hornsby–Akroyd oil engine - Wikipedia

    en.wikipedia.org/wiki/Hornsby–Akroyd_oil_engine

    1893 Hornsby–Akroyd oil engine at the museum of Lincolnshire life, Lincoln, England 14 hp Hornsby–Akroyd oil engine at the Great Dorset Steam Fair in 2008. The Hornsby–Akroyd oil engine, named after its inventor Herbert Akroyd Stuart and the manufacturer Richard Hornsby & Sons, was the first successful design of an internal combustion engine using heavy oil as a fuel.

  7. Petroleum refining processes - Wikipedia

    en.wikipedia.org/wiki/Petroleum_refining_processes

    The diagram depicts only one of the literally hundreds of different oil refinery configurations. The diagram also does not include any of the usual refinery facilities providing utilities such as steam, cooling water, and electric power as well as storage tanks for crude oil feedstock and for intermediate products and end products. [1] [2] [12]

  8. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    AGT – (1) agitator, used in drilling; AGT – (2) authorised gas tester (certified by OPITTO) AGT – (3) Azerbaijan – Georgia – Turkey (a region rich in oil related activity) [3] AHBDF – along hole (depth) below Derrick floor; AHD – along hole depth; AHU – air handling unit; AICD – autonomous inflow control device

  9. Helium dimer - Wikipedia

    en.wikipedia.org/wiki/Helium_dimer

    The binding energy is only about 1.3 mK, 10 −7 eV [6] [7] [8] or 1.1×10 −5 kcal/mol. [9] Both helium atoms in the dimer can be ionized by a single photon with energy 63.86 eV. The proposed mechanism for this double ionization is that the photon ejects an electron from one atom, and then that electron hits the other helium atom and ionizes ...