A sharp change in the atomic radius is observed from lithium to potassium but a gradual change in the atomic radius is ovesrved from potassium to caesium. Explain.

A sharp change in the atomic radius is observed from lithium to potass

1.	A sharp change in the atomic radius is observed from lithium to potassium but a gradual change in the atomic radius is ovesrved from potassium to caesium. Explain.
Answer» A sharp increase in the atomic radius is observed from lithium to potassium due to increase in the number of shells. But a gradual change is observed from potassoum to caesium due to filling up of d electrons in the pennultanate shell that increases tha effective nuclear charge. Hence, increase in size is gradual and not sharp.

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A sharp change in the atomic radius is observed from lithium to potassium but a gradual change in the atomic radius is ovesrved from potassium to caesium. Explain.

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