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  2. Reactivity (chemistry) - Wikipedia

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

    Both factors are actually distinct, and both commonly depend on temperature. For example, it is commonly asserted that the reactivity of alkali metals (Na, K, etc.) increases down the group in the periodic table, or that hydrogen's reactivity is evidenced by its reaction with oxygen. In fact, the rate of reaction of alkali metals (as evidenced ...

  3. Reactivity series - Wikipedia

    en.wikipedia.org/wiki/Reactivity_series

    The reactivity series is sometimes quoted in the strict reverse order of standard electrode potentials, when it is also known as the "electrochemical series". [ 8 ] The following list includes the metallic elements of the first six periods.

  4. Partial charge - Wikipedia

    en.wikipedia.org/wiki/Partial_charge

    Partial atomic charges can be used to quantify the degree of ionic versus covalent bonding of any compound across the periodic table. The necessity for such quantities arises, for example, in molecular simulations to compute bulk and surface properties in agreement with experiment.

  5. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    The periodic table and law are now a central and indispensable part of modern chemistry. The periodic table continues to evolve with the progress of science. In nature, only elements up to atomic number 94 exist; [a] to go further, it was necessary to synthesize new elements in the laboratory.

  6. Periodic trends - Wikipedia

    en.wikipedia.org/wiki/Periodic_trends

    Trend-wise, as one moves from left to right across a period in the modern periodic table, the electronegativity increases as the nuclear charge increases and the atomic size decreases. However, if one moves down in a group , the electronegativity decreases as atomic size increases due to the addition of a valence shell , thereby decreasing the ...

  7. Nucleophile - Wikipedia

    en.wikipedia.org/wiki/Nucleophile

    In general, in a group across the periodic table, the more basic the ion (the higher the pK a of the conjugate acid) the more reactive it is as a nucleophile. Within a series of nucleophiles with the same attacking element (e.g. oxygen), the order of nucleophilicity will follow basicity.

  8. Reactivity - Wikipedia

    en.wikipedia.org/wiki/Reactivity

    Reactivity may refer to: Reactivity (chemistry) , the rate at which a chemical substance tends to undergo a chemical reaction Reactive programming , a property of an execution model whereby changes are automatically propagated through a dataflow network

  9. Chemical reaction - Wikipedia

    en.wikipedia.org/wiki/Chemical_reaction

    A thermite reaction using iron(III) oxide. The sparks flying outwards are globules of molten iron trailing smoke in their wake. A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. [1]

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