Why phosphorus is diamagnetic?

Answer 1

Phosphorus is diamagnetic because it has a completely filled electron configuration in its ground state, which results in no unpaired electrons. In its most common form, phosphorus (P) has an atomic number of 15, leading to an electron configuration of 1s² 2s² 2p⁶ 3s² 3p³. While the 3p subshell contains three unpaired electrons, the overall nature of phosphorus is typically considered diamagnetic because the majority of its electrons are paired, leading to a net magnetic moment of zero in the absence of an external magnetic field.