Answer :

Metallic character goes on decreasing while going from left to right in a period because:


Metals have a tendency to lose their valence electrons to form a cation.


As we move from left to right, nuclear charge increases with increase in atomic number. This increase the force of attraction of electrons by the nucleus.


As a result, the tendency of losing electrons goes on decreasing.


Thus, metallic character decreases within a period.



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