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  2. Strontium bromide - Wikipedia

    en.wikipedia.org/wiki/Strontium_bromide

    Around 920 K (650 °C), α-SrBr 2 undergoes a first-order solid-solid phase transition to a much less ordered phase, β-SrBr 2, which adopts the cubic fluorite structure. The beta phase of strontium bromide has a much higher ionic conductivity of about 1 S/cm, comparable to that of molten SrBr 2 , due to extensive disorder in the bromide ...

  3. Structural formula - Wikipedia

    en.wikipedia.org/wiki/Structural_formula

    Lewis structures do give some thought to the geometry of the molecule as oftentimes, the bonds are drawn at certain angles to represent the molecule in real life. Lewis structure is best used to calculate formal charges or how atoms bond to each other as both electrons and bonds are shown.

  4. Lewis structure - Wikipedia

    en.wikipedia.org/wiki/Lewis_structure

    Lewis structure of a water molecule. Lewis structures – also called Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDs) – are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.

  5. Natural bond orbital - Wikipedia

    en.wikipedia.org/wiki/Natural_bond_orbital

    Natural bond orbitals (NBOs) include the highest possible percentage of the electron density, ideally close to 2.000, providing the most accurate possible “natural Lewis structure” of ψ. A high percentage of electron density (denoted %-ρ L ), often found to be >99% for common organic molecules, correspond with an accurate natural Lewis ...

  6. Seesaw molecular geometry - Wikipedia

    en.wikipedia.org/wiki/Seesaw_molecular_geometry

    Disphenoidal or seesaw (also known as sawhorse [1]) is a type of molecular geometry where there are four bonds to a central atom with overall C 2v molecular symmetry.The name "seesaw" comes from the observation that it looks like a playground seesaw.

  7. Asteroid Samples Contain Building Blocks of Life - AOL

    www.aol.com/news/asteroid-samples-contain...

    But its loose, rubble-rich structure suggests that it was once part of a much larger body, breaking away from it as a result of an impact with another object a few tens of millions of years ago.

  8. Gilbert N. Lewis - Wikipedia

    en.wikipedia.org/wiki/Gilbert_N._Lewis

    Gilbert Newton Lewis ForMemRS [1] (October 23 [2] [3] [4] or October 25, 1875 – March 23, 1946) [1] [5] [6] was an American physical chemist and a dean of the college of chemistry at University of California, Berkeley.

  9. Absolute configuration - Wikipedia

    en.wikipedia.org/wiki/Absolute_configuration

    Absolute configuration showing the determination of the R and S descriptors. In chemistry, absolute configuration refers to the spatial arrangement of atoms within a molecular entity (or group) that is chiral, and its resultant stereochemical description. [1]