The angular momentum of an electron in the fourth orbit of a hydrogen atom is 4.22 × 10⁻³⁴ J s. What is its energy in eV
n=4. E₄ = -13.6/16 = -0.85 eV.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Shapes of Orbitals - s p d f and Nodes and Radial Probability