What happens to electronic configuration on moving down the group and

1.	What happens to electronic configuration on moving down the group and across the period?
Answer» Covalent radius increases as we move down a group because the N level (orbital size) increases. Covalent radius mostly DECREASES as we move left to right ACROSS a period because the effective nuclear CHARGE experienced by the electrons increases, and the electrons are pulled in tighter to the nucleus.

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