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MHT CET202410 May 2024Morning ShiftChemistryStructure of AtomActual

Which of the following is radius of first orbit of He ⁺ ?

Options

  1. A52.90 pm
  2. B78.90 pm
  3. C26.45 pm
  4. D13.35 pm

Correct answer

C. 26.45 pm

Step-by-step solution

Radius of n ^ th orbit = r _ n = 52.9 ( n )^2 Z pm He ⁺ is a hydrogen-like species having Z =2 . Radius of the first orbit of He ⁺ aligned & = r ₁ & = 52.9 (1)^2 2 pm & =26.45 pm aligned

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