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NEET2024ChemistryStructure of AtomActual

The energy of an electron in the ground state (n=1) for He ⁺ ion is -x J , then that for an electron in n=2 state for Be ³⁺ ion in J is

Options

  1. A- x 9
  2. B-4 x
  3. C- 4 9 x
  4. D-x

Correct answer

D. -x

Step-by-step solution

E_n=-R_H ( z^2 n^2 ) J For He ⁺(n=1) , aligned & E_n=-x=-R_H ( 2^2 1^2 )=-4 R_H & R_H= x 4 & aligned For Be ³⁺(n=2) , aligned E_n & =-R_H ( z^2 n^2 ) J & =- x 4 ( 4 4 2 2 )=-x J aligned

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