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  2. VSEPR theory - Wikipedia

    en.wikipedia.org/wiki/VSEPR_theory

    Another example is O(SiH 3) 2 with an Si–O–Si angle of 144.1°, which compares to the angles in Cl 2 O (110.9°), (CH 3) 2 O (111.7°), and N(CH 3) 3 (110.9°). [24] Gillespie and Robinson rationalize the Si–O–Si bond angle based on the observed ability of a ligand's lone pair to most greatly repel other electron pairs when the ligand ...

  3. Electronegativity - Wikipedia

    en.wikipedia.org/wiki/Electronegativity

    Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons (or electron density) when forming a chemical bond. [1] An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the ...

  4. Bent's rule - Wikipedia

    en.wikipedia.org/wiki/Bent's_rule

    In chemistry, Bent's rule describes and explains the relationship between the orbital hybridization and the electronegativities of substituents. [1] [2] The rule was stated by Henry A. Bent as follows: [2] Atomic s character concentrates in orbitals directed toward electropositive substituents.

  5. Oxidizing agent - Wikipedia

    en.wikipedia.org/wiki/Oxidizing_agent

    The international pictogram for oxidizing chemicals. Dangerous goods label for oxidizing agents. An oxidizing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) is a substance in a redox chemical reaction that gains or "accepts"/"receives" an electron from a reducing agent (called the reductant, reducer, or electron donor).

  6. Periodic trends - Wikipedia

    en.wikipedia.org/wiki/Periodic_trends

    However, in group XIII (Boron family), the electronegativity first decreases from boron to aluminium and then increases down the group. It is due to the fact that the atomic size increases as we move down the group, but at the same time the effective nuclear charge increases due to poor shielding of the inner d and f electrons.

  7. 10 Discontinued Chick-Fil-A Menu Items That Customers Want ...

    www.aol.com/10-discontinued-chick-fil-menu...

    The Best Fast-Food Family Meal Deals to Feed a Crowd for. The 37 Best Costco Appetizers and Party Foods. This Month's Best Fast-Food Freebies and Deals at McDonald's, Taco Bell, and More.

  8. Contract for controversial entrance exam into ‘elite’ NYC ...

    www.aol.com/news/contract-controversial-entrance...

    A five-year, $17 million contract for the company that administers the city’s controversial entrance exam for specialized high schools was finally approved Wednesday after a highly-anticipated ...

  9. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...