1.

(i) State the basis of classification of elements in the modern periodic table ? (ii) How does the metallic character of element vary as we go down the group.

Answer»

Solution :(i) Atomic number.
(II) Down the group, the EFFECTIVE nuclear charge experienced by the valence ELECTRON is decreasing because the outer most electrons are further away from the nucleus. Therefore, they can be lost EASILY. Hence metallic character increases down the group.


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