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Look at the answers for #'s 2-4 above and look for a pattern between group #'s and valance electrons. Describe it...
Exept for the transtion elements the group # tells the # of the valance electrons
The ________, or the elements in 1B througn 8B, do not follow the pattern of electrons and group #'s quite the way the elements in 1A and group 2
_____ valamce electrons means that the atom is stable( with the exeption of helium) which is____valance electrons.
8 then 2
Explain why helium is stable with just 2 valance electrons:_______________
the first orbital is full with 2 electrons
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