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Atomic radius of Cs is larger than that of Rb. Explain why?

Atomic radius of Cs is larger than that of Rb. Explain  why?

Grade:12th pass

1 Answers

Arun
25750 Points
4 years ago
Dear Shreya
 
Electronic orbitals do not come in fixed sizes. A given orbital will shrink due to greater nuclear charge as more protons are addded to the nucleus. Going from Rb to Cs you are adding more orbitals than when you go from Na to K But you are also adding more orbital-shrinking protons to the nucleus.

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