Question

Define shielding effect. and it's trend in period and group ​

Answer 1

Answer:

More the electron shells, greater is the shielding effect experienced by the outermost electrons. Hence screening or shielding effect increases in a group as shells increases from top to bottom but in a period it decreases from left to right because of increase in atomic number and no change in shells.

Explanation:

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Answer 2

Answer:

More the electron shells, greater is the shielding effect experienced by the outermost electrons. Hence screening or shielding effect increases in a group as shells increases from top to bottom but in a period it decreases from left to right because of increase in atomic number and no change in shells.