Radius of the first excited state of Helium ion is given as : a 0 → radius of first stationary state of hydrogen atom.

r = a 0 ( z n 2 ) r = ( 2 ) a 0 ( 2 ) 2 r = 2 a 0

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ChemistryAtomic StructureBohr's Atomic ModelEasy2 minPYQ_2025

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Radius of the first excited state of Helium ion is given as : $a_{0} \to$ radius of first stationary state of hydrogen atom.

Answer:

Solution:

$r = a_{0} (\frac{n ^{2}}{z}) r = \frac{a _{0} ( 2 ) ^{2}}{( 2 )} r = 2 a_{0}$

Stream:JEESubject:ChemistryTopic:Atomic StructureSubtopic:Bohr's Atomic Model

⏱ 2mℹ️ Source: PYQ_2025

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