| Shell: f-block | |
| . .. | |
| .. .. . . . . . .. | |
| .. .. .. .. . . .. .. | |
| . .. .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. | |
| .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. . .. | |
| .. .. La .. .. . .. .. .. .. .. .. .. .. .. .. .. .. | |
| .. .. Ac .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. | |
| Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu | |
| Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr | |
| The f-block consists of elements in the Lanthanides and Actinides | |
| families. The valence electrons of these elements are in the f-shell. | |
| This shell holds at most 14 electrons, and has an azimuthal quantum | |
| number of 3. The "f" stands for "fundamental". | |
| 57 La Lanthanum | |
| 58 Ce Cerium | |
| 59 Pr Praseodymium | |
| 60 Nd Neodymium | |
| 61 Pm Promethium | |
| 62 Sm Samarium | |
| 63 Eu Europium | |
| 64 Gd Gadolinium | |
| 65 Tb Terbium | |
| 66 Dy Dysprosium | |
| 67 Ho Holmium | |
| 68 Er Erbium | |
| 69 Tm Thulium | |
| 70 Yb Ytterbium | |
| 71 Lu Lutetium | |
| 89 Ac Actinium | |
| 90 Th Thorium | |
| 91 Pa Protactinium | |
| 92 U Uranium | |
| 93 Np Neptunium | |
| 94 Pu Plutonium | |
| 95 Am Americium | |
| 96 Cm Curium | |
| 97 Bk Berkelium | |
| 98 Cf Californium | |
| 99 Es Einsteinium | |
| 100 Fm Fermium | |
| 101 Md Mendelevium | |
| 102 No Nobelium | |
| 103 Lr Lawrencium | |
| All Shells |