Chemistry PERIODICITY IN METALLIC & NON-METALLIC CHARACTER

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PERIODICITY IN METALLIC & NON-METALLIC CHARACTER

Metallic Character :

It is the tendency to lose electrons. On moving from left to tight in a period metallic character decreases but increases on moving top to bottom in a group. e.g. Metallic character across the period, `Na > Mg > Al`. Metallic character down the group e.g. group-`I` `Cs > Rb > K > Na > Li`.

Non-Metallic Character :

It is the tendency to accept the electron. On moving from left to right in a period the non-metallic character increases due to increase in the effective nuclear charge but decreases on moving top to bottom in a group as an increase in the number of shell force of attraction decrease.