Home » Modern Physics » Atoms » Question

Atoms

Easy Questions

Modern Physics

Dual Nature of Radiation and Matter
Atoms
Nuclei
Semiconductor Electronics : Materials, Devices and Simple Circuits
  1. When hydrogen atom is in its first excited level, its radius is
    1. four times its ground state radius
    2. twice
    3. same
    4. half
Correct Option: A

R =
R0 n2
Z

Radius in ground state
=
R0
Z

Radius in first excited state
=
R0 × 4
Z

(∴ n = 2)
Hence, radius of first excited state is four times the radius in ground state.


Your comments will be displayed only after manual approval.