Practice question

MCQ

Question

The energy of an electron in the second orbit of a hydrogen atom is -5.45 × 10⁻¹⁹ J. What is its energy in the fourth orbit?

Options

Choose one · Correct answer highlighted

-1.3625 × 10⁻¹⁹ J Correct -2.725 × 10⁻¹⁹ J -5.45 × 10⁻¹⁹ J -8.72 × 10⁻¹⁹ J

Explanation

E₄ = -2.18×10⁻¹⁸/16 = -1.3625×10⁻¹⁹ J.

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