The radius of the first excited state of a Helium ion $(He^+)$ is given by (where $a_0$ is the radius of the first stationary state of the hydrogen atom):
- A$r = \frac{a_0}{2}$
- B$r = \frac{a_0}{4}$
- C$r = 4 a_0$
- D$r = 2 a_0$
Explore More
Similar Questions
The radius of the second orbit of a hydrogen atom is the same as that of orbit $n$ of an ion $x$. $n$ and $x$ are respectively:
The ratio of the minimum wavelengths of the Lyman and Balmer series is ...... .
Medium
View SolutionCalculate the energy associated with the second orbit of $Li^{+}$ and find its radius.
When an electron jumps from a lower to a higher orbit,its energy
Easy
View SolutionThe ratio of energy of a hydrogen atom for the first and second excited states is ......
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo