The discussion centers on the concept of electron probability density and its spherically symmetric distribution. It is established that the probability density of an atomic electron is spherically symmetric when the wave function's angular quantum number (l) is 0. In this case, the probability density does not vary with angular coordinates, indicating that the electron's likelihood of being found is uniform in all directions around the nucleus. This symmetry arises from the mathematical properties of the wave function, specifically the solutions to the Schrödinger equation for hydrogen-like atoms, where the radial part of the wave function is independent of angular variables when l equals 0. Understanding this concept is crucial for applying probability density in quantum mechanics and interpreting electron distributions in atomic models.