In the case of sodium, ionizing the atom completely removes the 3s valence shell. The remaining electrons are tightly bound and require far more energy to remove. As a result, the sodium ion is far more inert than the sodium atom.
Table Some differences in chemical and physical properties for sodium ion and sodium atom.
|Property||Na atom||Na+ ion|
|charge||neutral (0)||positive (+1)|
|pure form||soft, shiny metal||not found pure; must be combined with anions to form stable ionic compounds|
|reaction with water||violent exothermic reaction with water forms Na+(aq), OH-(aq), H2(g)||Na+ dissolves in water without further reaction|
|reaction with hydrogen gas||2 Na(s) + H2(g) 2 NaH(s)||no reaction|
|reaction with oxygen gas||2 Na(s) + O2(g) Na2O2(s)||no reaction|
|reaction with alcohol||2 Na(s) + 2 C2H5OH()
2 NaOC2H5 + H2(g)
|conductivity||Na(s) is an excellent conductor of heat and electricity||Na+ solid compounds are poor conductors of heat and electricity; Na+ in aqueous solution conducts electricity|
Author: Fred Senese email@example.com
Copyright © 1997-2010 by Fred Senese
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Last Revised 08/17/15.URL: http://antoine.frostburg.edu/chem/senese/101/atoms/faq/print-sodium-ion-vs-atom.shtml