Electropositivity: Difference between revisions
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{{mergeto|Electronegativity|discuss=Talk:Electropositivity#Merger proposal|date=September 2010}} |
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'''Electropositivity''' is a measure of an element's ability to donate [[electrons]], and therefore form positive [[ions]]. Mainly, this is an attribute of [[metals]], meaning that for the most part, the greater the metallic character of an [[chemical element|element]], the greater the electropositivity. Therefore the [[alkali metals]] are most electropositive of all. This is because they have a single electron in their outer shell and, as this is relatively far from the nucleus of the atom, it is easily lost; in other words, these metals have low [[ionization]] energies.<ref>"[http://au.encarta.msn.com/encyclopedia_781538810/Electropositivity.html Electropositivity]," [[Microsoft Encarta]] Online Encyclopedia 2009. [http://www.webcitation.org/5kwpIKRbL Archived] 2009-10-31.</ref> |
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Electropositivity is opposed to [[electronegativity]]: the ability of an element to attract electrons. While electronegativity increases along [[Period (periodic table)|periods]] in the [[periodic table]], and decreases down [[Periodic table group|groups]], electropositivity ''decreases'' along periods and ''increases'' down groups. |
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[[Electropositive metal]]s are also utilized as shark repellents, since they generate measurable voltages in a seawater electrolyte relative to a shark. |
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==References== |
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{{reflist}} |
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{{chemistry-stub}} |
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[[cs:Elektropozitivita]] |
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[[es:Electropositividad]] |
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[[eu:Elektropositibotasun]] |
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[[pl:Elektrododatniość]] |
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[[pt:Eletropositividade]] |
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[[sv:Elektropositivitet]] |
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[[Category:Chemistry]] |
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Revision as of 22:21, 22 September 2010
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