Question

the metallic character of elements in a period from top to bottom

Answer 1

The metallic character of elements keeps increasing from top to bottom within a group of the modern periodic table. This is because a shell is added everytime resulting in reducing the effective nuclear charge. So elements tend to give away electrons.

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Answer 2

the metallic character increases from top to bottom in a group cause the size increases so its becomes easier to donate electrons

and as we know that metals are good electrons donaters

so metallic character increases