Question

How do atomic structures ( electron arrangements ) change in a period with increase in atomic numbers moving left to right

Answer 1

in period the no. of electron increase but the no. of shell remains same and thus the atomic radius in period decrease on moving from left to right

Answer 2

Atomic radius decreases from left toright within a period. This is caused by the increase in the number of protons and electrons across a period. One proton has a greater effect than one electron; thus, electrons are pulled towards the nucleus, resulting in a smaller radius.

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