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BITSAT2013ChemistryStructure of AtomActual

The Bohr orbit radius for the hydrogen atom (n=1) is approximately 0.530 Ã . The radius for the first excited state (n=2) orbit is ( in Ã)

Options

  1. A0.13
  2. B1.06
  3. C4.77
  4. D2.12

Correct answer

D. 2.12

Step-by-step solution

Radius of hydrogen atom =0.530 Ã… , Number of excited state (n)=2 and atomic number of hydrogen atom (Z)=1 . We know that the Bohr radius. (r)= n² Z Radius of atom = (2)² 1 0.530 =4 0.530=2.12 Ã…

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