How do atomic radius vary in a period and in a group? How do you expla

1.	How do atomic radius vary in a period and in a group? How do you explain the variation.
Answer» Solution :WITHIN a group atomic radius INCREASES down the group. Reason: This is due to CONTINUOUS increases in the number of electronic shells or orbit numbers in the structure of atoms of the elements down a group. Variation across PERIOD: Atomic radii: From left to right across a period atomic radii generally decreases due to increase in effective nuclear charge from left to right across a period.

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