| Group | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | ||
| Period |
1
▼ |
1
H
Hydrogen
1s1
|
2
He
Helium
1s2
|
Tip: Hover over an element to compare its electron configuration to that of the element to its right.