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How does metallic character vary among g...

How does metallic character vary among group 14 elements ? How is it related to ionisation energy ?

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Carbon and silicon are non metals . Germanium is a metalloid and tin and lead are metals. Metallic character increases from carbon to lead . The change from non metallic to metallic character is due to the increase in atomic size from carbon to lead . Consequently the ionsiation potential favouring ionic bonding especially with oxidation state +2 , whereas carbon and silicon show +4 oxidaiton state forming covalent bonding with electron sharing.
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