The p d and f orbitals have different sublevels. The four different types of orbitals spd and f have different shapes and one orbital can hold a maximum of two electrons. Electron Configuration Basic Introduction Youtube 111 rows The first examples of transition metals Sc Ti V Cr Mn Fe Co Ni Cu Zn are found in the fourth period even though the distinguishing electron in each case is a 3 d. . In atomic physics and quantum chemistry the electron configuration is the arrangement of electrons in an atom molecule or other physical structure. In a more realistic model electrons move in atomic orbitals or subshells. The 15 electrons of the phosphorus atom will fill up to the 3 p orbital which will contain three electrons. Help explain the properties of elements and the structure of the periodic table. For example the electron. The p d and f orbitals have different sublevels thus can hold more. Electron configurat...