The difference between the 1^st and the 2^nd ionisation energy of Li is much higher than that of Be.

The significant difference between the first and second ionization energies of lithium (Li) as compared to beryllium (Be) can be attributed to the electronic configurations and the nuclear charges of both elements.

Lithium has the electronic configuration 1s² 2s¹. The first ionization involves removing the single 2s electron, which is relatively far from the __________ ________ _____ ________ _____ ________ _____ _________ ________ ______ __________ _____.
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