Question: We expect the atomic radius to increase going down a group in the periodic table. Can you suggest why the atomic radius of hafnium breaks

We expect the atomic radius to increase going down a group in the periodic table. Can you suggest why the atomic radius of hafnium breaks this rule? (See data below.)

Atomic Radii (in pm) 147.7 159.3 147.6 Sc Y La 157 169.3

Atomic Radii (in pm) 147.7 159.3 147.6 Sc Y La 157 169.3 191.5 Ti Zr Hf

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