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  2. 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 ...

  3. Wikipedia : Manual of Style/Chemistry/Structure drawing

    en.wikipedia.org/.../Chemistry/Structure_drawing

    From the “File” menu, choose “Apply document settings from → ACS Document 1996”. Draw the structure, and save it as a ChemDraw file. If you drew the structure before applying any settings, then you need to select the object, open the “Object” menu and choose “Apply document settings from → ACS Document 1996”.

  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. Chemical reaction - Wikipedia

    en.wikipedia.org/wiki/Chemical_reaction

    Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur. The substance (or substances) initially involved in a chemical reaction are called reactants or reagents.

  6. Doctors Say This Nighttime Behavior Can Be A Sign Of Dementia

    www.aol.com/doctors-nighttime-behavior-sign...

    Here's how to distinguish "sundowning"—agitation or confusion later in the day in dementia patients—from typical aging, from doctors who treat older adults.

  7. Benzyl group - Wikipedia

    en.wikipedia.org/wiki/Benzyl_group

    For example, (C 6 H 5)(CH 3) 2 C + is referred to as a "benzylic" carbocation. The benzyl free radical has the formula C 6 H 5 CH 2 •. The benzyl cation or phenylcarbenium ion is the carbocation with formula C 6 H 5 CH + 2; the benzyl anion or phenylmethanide ion is the carbanion with the formula C 6 H 5 CH − 2.

  8. Mole (unit) - Wikipedia

    en.wikipedia.org/wiki/Mole_(unit)

    The mole is widely used in chemistry as a convenient way to express amounts of reactants and amounts of products of chemical reactions. For example, the chemical equation 2 H 2 + O 2 → 2 H 2 O can be interpreted to mean that for each 2 mol molecular hydrogen (H 2 ) and 1 mol molecular oxygen (O 2 ) that react, 2 mol of water (H 2 O) form.

  9. Donna A. James - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/donna-a-james

    From July 2011 to December 2012, if you bought shares in companies when Donna A. James joined the board, and sold them when she left, you would have a 49.2 percent return on your investment, compared to a 6.6 percent return from the S&P 500.