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Question

Hydrogen atom, unipositive helium, dipositive lithium contain single electron in the same shell. Is the radius of the shell same in all cases? Give reason.

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Solution

For hydrogen and hydrogen atom radius of nth orbital is given by Rn=Ro×n2Z (Z=atomic number)
n=1 for H, He+and Li+2
HR1=Ro×11Li+2R1=Ro×13
He+R1=Ro×12
Therefore, the radius will be different.

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