| Period | Group | |
|---|---|---|
| ◀ f2 ▶ | ||
| 1 | ||
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
| 6 |
58
Ce
Cerium
[Xe] 6s2 4f1 5d1
|
|
| 7 |
90
Th
Thorium
[Rn] 7s2 6d2
|
Tip: Hover over an element to compare its electron configuration to that of the element below it.