Light can be emitted from the atom but light is not part of the atom. Electron can be emitted from the atom but electron is not part of the atom.
The orbit of Mercury according to NASA's data is different from any geodesic in Schwarzschild manifold. There are two geodesic constants for Schwarzschild's metric. Both constants can be calculated from NASA's data for Mercury. The calculation shows that there is singularity in the geodesic at the aphelion and the perihelion.
Schwarzschild's metric, derived from Albert Einstein's theory of gravitation, is not compatible with the orbit of Mercury. The space-time geometry is not a representation of gravitation.