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  2. Jeffry D. Madura - Wikipedia

    en.wikipedia.org/wiki/Jeffry_D._Madura

    He co-authored a widely adopted textbook: General Chemistry: Principles and Modern Applications, 11th ed. (with Ralph Petrucci, F. Herring, and Carey Bissonnette). [6] He was also the co-editor of the Journal of Molecular Graphics and Modelling for many years. [7]

  3. Thermodynamic activity - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_activity

    The relative activity of a species i, denoted a i, is defined [4] [5] as: = where μ i is the (molar) chemical potential of the species i under the conditions of interest, μ o i is the (molar) chemical potential of that species under some defined set of standard conditions, R is the gas constant, T is the thermodynamic temperature and e is the exponential constant.

  4. Transition metal - Wikipedia

    en.wikipedia.org/wiki/Transition_metal

    In chemistry, a transition metal (or transition element) is a chemical element in the d-block of the periodic table (groups 3 to 12), though the elements of group 12 (and less often group 3) are sometimes excluded.

  5. d electron count - Wikipedia

    en.wikipedia.org/wiki/D_electron_count

    The usual explanation in chemistry textbooks is that half-filled or completely filled subshells are particularly stable arrangements of electrons. [6] An example is chromium whose electron configuration is [Ar]4s 1 3d 5 with a d electron count of 5 for a half-filled d subshell, although Madelung's rule predicts [Ar]4s 2 3d 4 .

  6. Yield (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Yield_(chemistry)

    Relation between chemical reaction conversion selectivity and yield. In chemical reaction engineering, "yield", "conversion" and "selectivity" are terms used to describe ratios of how much of a reactant has reacted—conversion, how much of a desired product was formed—yield, and how much desired product was formed in ratio to the undesired product—selectivity, represented as X, S, and Y.

  7. Thermochemistry - Wikipedia

    en.wikipedia.org/wiki/Thermochemistry

    Thermochemistry is the study of the heat energy which is associated with chemical reactions and/or phase changes such as melting and boiling.A reaction may release or absorb energy, and a phase change may do the same.

  8. Skip The Boring Date Night: 22 Ideas That Actually Slap - AOL

    www.aol.com/22-date-night-ideas-aren-090054910.html

    Romance needs a refresh when your idea of spicing things up means ordering from a different takeout spot. Level up your love life with 22 date ideas that go beyond the basic dinner reservation ...

  9. Gravimetric analysis - Wikipedia

    en.wikipedia.org/wiki/Gravimetric_analysis

    Gravimetric analysis describes a set of methods used in analytical chemistry for the quantitative determination of an analyte (the ion being analyzed) based on its mass. The principle of this type of analysis is that once an ion's mass has been determined as a unique compound, that known measurement can then be used to determine the same analyte's mass in a mixture, as long as the relative ...