Electron Transition Energy Levels Diagram

The diagram illustrates fundamental processes within an atom, showcasing electron behavior across its distinct energy levels, represented by concentric circles around a central nucleus. A blue arrow indicates energy absorption (E), leading to an electron's excitation to a higher energy state. Conversely, the green elements depict an electron's transition from a higher to a lower energy level, accompanied by the emission of a photon, symbolized by the red wavy line (hv). This visually explains how electrons absorb and release energy, forming the basis of atomic spectroscopy.

electron - atom - energy levels - photon - quantum mechanics - atomic structure