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AIIMS 2005
Exam
AIIMS
Year
2005
Subject
Chemistry
Chapter
Structure of Atom

AIIMS 2005 · Chemistry · Structure of Atom

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

The most probable radius (in pm) for finding the electron in He+\mathrm{He}^{+}is

Options

  1. A0.0
  2. B52.9
  3. C26.5
  4. D105.8

Correct answer

C. 26.5

Step-by-step solution

Most probable radius =a0/Z=a_0 / Z where a0=52.9pma_0=52.9 \mathrm{pm}. For helium ion, Z=2Z=2. r_{\mathrm{mp}}=52.92=\frac{52.9}{2}=26.45 pm\mathrm{pm}
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