Inert pair effect?
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Meghna Thapar 4 years, 9 months ago
The inert pair effect is the tendency of the two electrons in the outermost atomic s-orbital to remain unshared in compounds of post-transition metals. The inert pair effect explains why common ions of Pb are Pb4+ and Pb2+, and not just Pb4+ as we might expect from the octet rule. Screening effect : The shielding effect describes the balance between the pull of electrons on valence electrons and the repulsion forces from inner electrons.
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