1.

Ionization energy of beryllium is greater than the ionization energy of boron. Why?

Answer»

Solution :`Be (Z =4) 1s^2 2s^2`. It has completely filled valence electrons, which requires HIGH `IE_1`.
`B (Z =5) 1s^2 2s^2 2p^`. It has INCOMPLETELY filled valence electrons, which requires comparatively less `IE_1`. Hence `I.E_1. Begt I.E_1 B`.


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