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KCET2024ChemistryStructure of Atom

The energy associated with first orbit of He ⁺ is

Options

  1. A0 J
  2. B-8.72 10⁻¹⁸ ~J
  3. C-4.58 10⁻¹⁸ ~J
  4. D-0.545 10⁻¹⁸ ~J

Correct answer

B. -8.72 10⁻¹⁸ ~J

Step-by-step solution

Given, Z=2n=1 Using the formula of energy E=-218 10⁻¹⁸ Z^2 n^2 On substituting the value of Z and n=-2.18 10⁻¹⁸ (2)^2 (1)^2 E=-8.72 10⁻¹⁸ ~J

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