+3d1 denotes a single electron occupying a [3d orbital](/wiki/3d_orbital), a specific energy level and shape around an atomic nucleus. This configuration is fundamental to understanding an atom's electronic structure and its [chemical properties](/wiki/Chemical_properties). It helps predict how elements interact.
+## See also
+- [Electron configuration](/wiki/Electron_configuration)
+- [Atomic orbital](/wiki/Atomic_orbital)
+- [Quantum numbers](/wiki/Quantum_numbers)