both helium and beryllium have two electrons in the valence shells. helium is a noble gas where as beryllium is a metal,justify
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electronic configuration of
He : 1s²
Be : 1s² 2s²
helium has completely filled outermost shell but beryllium is incomplete.
there are 2 orbitals in in shell with n=2 ,i.e "s" and "p". here for berylium p orbital is unfilled.
hence it isnt stable.
He : 1s²
Be : 1s² 2s²
helium has completely filled outermost shell but beryllium is incomplete.
there are 2 orbitals in in shell with n=2 ,i.e "s" and "p". here for berylium p orbital is unfilled.
hence it isnt stable.
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Helium:
It contains two electrons in its valence shell but it has got only one shell. If shell needs no more ejections as it is already complete and stable.
Beryllium:
It also contains two electrons in its valence shells but it's shell is incomplete as it needs right electron to become stable so it is metallic. It is metallic because it losses electrons to become stable.
Hope it helps ^_^
It contains two electrons in its valence shell but it has got only one shell. If shell needs no more ejections as it is already complete and stable.
Beryllium:
It also contains two electrons in its valence shells but it's shell is incomplete as it needs right electron to become stable so it is metallic. It is metallic because it losses electrons to become stable.
Hope it helps ^_^
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