Chapter/Index: Introduction | A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
Appendix
5f Elements in Periodic Table
| Table 4692a. 5f elements in periodic table.

Table 4692b. Electron configurations, filling orbitals, and valence electrons of 5f elements.
| Atomic Number |
Symbol |
Name |
Electron Configuration |
Filling Orbital |
Valence Electrons |
| 89 |
Ac |
Actinium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10 6s2p6d1 7s2 |
6d1 |
6d17s2 |
| 90 |
Th |
Thorium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10 6s2p6d2 7s2 |
6d2 |
6d27s2 |
| 91 |
Pa |
Protactinium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f26s2p6d1 7s2 |
5f2 |
5f26d17s2 |
| 92 |
U |
Uranium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f36s2p6d1 7s2 |
5f3 |
5f36d17s2 |
| 93 |
Np |
Neptunium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f46s2p6d1 7s2 |
5f4 |
5f46d17s2 |
| 94 |
Pu |
Plutonium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f66s2p6 7s2 |
5f6 |
5f6 7s2 |
| 95 |
Am |
Americium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f76s2p6 7s2 |
5f7 |
5f7 7s2 |
| 96 |
Cm |
Curium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f76s2p6d1 7s2 |
5f7 |
5f7 6d1 7s1 |
| 97 |
Bk |
Berkelium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f86s2p6d1 7s2 |
5f8 |
5f8 6d1 7s2 |
| 98 |
Cf |
Californium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f106s2p6 7s2 |
5f10 |
5f10 7s2 |
| 99 |
Es |
Einsteinium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f116s2p6 7s2 |
5f11 |
5f11 7s2 |
| 100 |
Fm |
Fermium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f126s2p6 7s2 |
5f12 |
5f12 7s2 |
| 101 |
Md |
Mendelevium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f136s2p6 7s2 |
5f13 |
5f13 7s2 |
| 102 |
No |
Nobelium |
1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10f146s2p6 7s2 |
5f14 |
5f14 7s2 |
|