why He2+ ion is less stable?
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He2+ ion does not exist in general form.....(so how can we answer ur question.) However the reason for this stability issue is that Helium is an inert element and if somehow it loses 2 electrons it will require tgem to attain nearest stable electronic configuration(octet or duplet)which in this case will be octet due to which it will become more reactive
sona22:
i mean to say why it has less stable arrangement as compared to H2.....by explaining through molecular orbital theory.
because every element that does not have stable electronic configuration that is either 2 or 8 electrons in the valence shell it has the tendency to accept or lose electrons in order to reach nearest noble gas configuration because of which it becomes unstable
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Two electrons total, both occupy the sigma orbital, two more electrons in bonding than antibonding orbitals, the compound is stable. Eg: He + He; same mixing as above. ... Since there are as many bonding electrons as as antibonding, there is no net bond. He2 is not possible.
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