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AIIMS 2010
Exam
AIIMS
Year
2010
Subject
Physics
Chapter
Atomic Physics

AIIMS 2010 · Physics · Atomic Physics

What would be the radius of second orbit of He^ + ion?

What would be the radius of second orbit of He+\mathrm{He}^{+} ion?

Options

  1. A1.058A˚1.058 Å
  2. B3.023A˚3.023 Å
  3. C2.068A˚2.068 Å
  4. D4.458A˚4.458 Å

Correct answer

A. 1.058A˚1.058 Å

Step-by-step solution

r=\frac{n^2}{Z} \times 0.529ForFor\mathrm{He}^{+}, n=2, Z=1 r=42×0.529=1.058A˚\begin{aligned}& r=\frac{4}{2} \times0.529 \\ & =1.058 Å \end{aligned}
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