Which is not a similar characteristic about t | vedclass

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(B) $Be (Z=4): 1s^2 2s^2$$Mg (Z=12): 1s^2 2s^2 2p^6 3s^2$$Ca (Z=20): 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$All three elements have a pair of $s-$ electrons in

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All the atoms contain a pair of $p-$ electrons in their outermost energy level

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(B) $Be (Z=4): 1s^2 2s^2$$Mg (Z=12): 1s^2 2s^2 2p^6 3s^2$$Ca (Z=20): 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$All three elements have a pair of $s-$ electrons in their outermost shell $(ns^2)$ and belong to the alkaline earth metals (Group $2$).They do not contain $p-$ electrons in their outermost shell because they are $s-$ block elements.

Which is not a similar characteristic about the electronic configuration of $Be, Mg, Ca$?

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