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why is there a dip in ionization energies between the elements Be and B, between Mg and Al, and between Ca and Ga?

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precalculus
Be and B: Be is 1s2 2s2 and B is 1s2 2s2 2p1
Be has full 2 orbitals and so does B but B only has 1 electron in p so it is really unstable and easy to react. So there is a dip in ionization energies. The other questions are similar to this so if you need, feel free to ask me

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