Tuesday, December 31, 2019

inorganic chemistry - How can I relate the reactivity series to electronegativity and ionization energy?


I am trying to figure out how the reactivity series comes about. My understanding is that elements with a higher electronegativity will be more reactive than elements with a lower electronegativity, and that elements with a low ionization energy will be more reactive than elements with a high ionization energy.


Here is a chart of electronegativity (from Wikipedia):




This shows electronegativity decreasing (as reactivity increases) down Group 1 and it also decreasing (as reactivity decreases) down Group 7.


Here is a chart of ionization energy:


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This shows ionization energy decreasing (as reactivity increases) down Group 1 and it also decreasing (as reactivity decreases) down Group 7.


Neither electronegativity nor ionization energy can predict both reactivity trends, so what is going on?




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