jojo1600 Posted July 15, 2009 Share Posted July 15, 2009 pls do help me on this......... in thermionic emission nucleus of the thermionic element is not strong enough to hold the electrons in the outer orbit which means that the meson particle which mediates the strong force between the protons and neutrons in the nucleus is having the less limited range than the electromagnetic repulsion of the protons. isn't it? and thermionic element is said to have high mechanical strength. my doubt is that if the element is not having the strong nucleus how they will have the high mechanical strength? Link to comment Share on other sites More sharing options...
insane_alien Posted July 15, 2009 Share Posted July 15, 2009 thermionic emission has nothing to do with the stability ofthe nucleus or the strong nuclear force(mediated by gluons not mesons). thermionic emission occurs because the outer electrons are only weakly held to the the atom so given relatively little energy input (in this case thermal vibrations) the electron can be released into free space. also, nucleus stability has nothing to do with mechanical strength which is due to interactions of the electron shells. a diamond made of C12 and a diamond made of C14 will be equally hard, but the diamond made of C14 will degrade over time eventually becoming composed of nitrogen which won't stick around. Link to comment Share on other sites More sharing options...
jojo1600 Posted July 17, 2009 Author Share Posted July 17, 2009 thank you... Link to comment Share on other sites More sharing options...
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