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  4. The most probable radius (in pm) for finding the electron in He+ is

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Q. The most probable radius (in pm) for finding the electron in $He^+$ is

AIIMSAIIMS 2005Structure of Atom

Solution:

Bohr's radius $(r)=\frac{59.2 n^{2}}{Z} pm$
$n=$ number of the shell
$Z=$ atomic number
$r=\frac{52.9 \times 1^{2}}{2} pm =26.45\, pm$