Question

What is the principal quantum number for third excited state?Answer the given question in brief.

Answer 1

When an electron absorbs energy, it occupies a higher energy orbital, and is said to be in an excited state.

A hydrogen atom is in its third excited state, with principal quantum number 4.

The atom emits a photon with a wavelength of 487 nm.

The principal quantum number (n) describes the electron shell, or energy level, of an electron.

The value of n ranges from 1 to the shell containing the outermost electron of that atom, i.e. n = 1, 2, ...