Which is not similar characteristic(s) about the electronic configuration of Be, Mg, Ca? (a) All...

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Which is not similar characteristic(s) about the electronic configuration of Be, Mg, Ca?
(a) All the atoms have a pair of s-electrons in their outermost energy level
(b) All the atoms contain a pair of \( p \)-electrons in their outermost energy level
\( P \)
(c) All are alkaline earth metals
W.
(d) All are of second group of the periodic table
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