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  2. HSAB theory - Wikipedia

    en.wikipedia.org/wiki/HSAB_theory

    HSAB is widely used in chemistry for explaining the stability of compounds, reaction mechanisms and pathways. It assigns the terms 'hard' or 'soft', and 'acid' or 'base' to chemical species . 'Hard' applies to species which are small, have high charge states (the charge criterion applies mainly to acids, to a lesser extent to bases), and are ...

  3. Ralph Pearson - Wikipedia

    en.wikipedia.org/wiki/Ralph_Pearson

    Ralph Gottfrid Pearson (January 12, 1919 – October 12, 2022) was an American physical inorganic chemist best known for the development of the concept of hard and soft acids and bases (HSAB). He received his Ph.D. in physical chemistry in 1943 from Northwestern University , and taught chemistry at Northwestern faculty from 1946 until 1976 ...

  4. Pearson distribution - Wikipedia

    en.wikipedia.org/wiki/Pearson_distribution

    A Pearson density p is defined to be any valid solution to the differential equation (cf. Pearson 1895, p. 381) ′ () + + + + = ()with: =, = = +, =. According to Ord, [3] Pearson devised the underlying form of Equation (1) on the basis of, firstly, the formula for the derivative of the logarithm of the density function of the normal distribution (which gives a linear function) and, secondly ...

  5. Chemistry - Wikipedia

    en.wikipedia.org/wiki/Chemistry

    Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.

  6. Machine Gun Kelly Broke His Silence on Megan Fox’s Pregnancy ...

    www.aol.com/machine-gun-kelly-broke-silence...

    Machine Gun Kelly and Megan Fox are gearing up to be parents—news Megan revealed a few weeks ago via a photo shoot where she was naked and covered in black oil. You know, just a casual totally ...

  7. Outline of chemistry - Wikipedia

    en.wikipedia.org/wiki/Outline_of_chemistry

    The following outline acts as an overview of and topical guide to chemistry: . Chemistry is the science of atomic matter (matter that is composed of chemical elements), especially its chemical reactions, but also including its properties, structure, composition, behavior, and changes as they relate to the chemical reactions.

  8. Hidalgo scores 29 as No. 8 Notre Dame holds off No. 2 UConn 79-68

    www.aol.com/hidalgo-scores-29-no-8-020435676.html

    Hannah Hidalgo had 29 points, 10 rebounds and eight assists, and No. Notre Dame handed second-ranked UConn its first loss with a 79-68 victory Thursday night. Olivia Miles toughed out an early ...

  9. Electronegativity - Wikipedia

    en.wikipedia.org/wiki/Electronegativity

    The effect is much larger than could be explained by the negative charge being shared among a larger number of oxygen atoms, which would lead to a difference in pK a of log 10 (1 ⁄ 4) = –0.6 between hypochlorous acid and perchloric acid. As the oxidation state of the central chlorine atom increases, more electron density is drawn from the ...