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CUET
Physics
Atoms
The radius of the inner most electron orbit of a hydrogen atom is 0.53 Å. What is the radius of orbit of 2nd excited state?
1.06 Å
1.59 Å
2.12 Å
4.77 Å
For second excited state n = 3
$r = r_0 n^2 = 0.53A^o \times 3^2 = 4.77 A^o$