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Tendency of s-electrons in valence shell to remain inert, increasing stability of lower oxidation states down the group.
Example: +1 state stable for Tl (Group 13), +2 for Pb (Group 14).
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Tendency of s-electrons in valence shell to remain inert, increasing stability of lower oxidation states down the group.
Example: +1 state stable for Tl (Group 13), +2 for Pb (Group 14).
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