Element | Atomic No. | Electronic structure | Abundance in earth's crust (in ppm) | Relative abundance |
---|---|---|---|---|
Oxygen (O) | 8 | [He] 2s2 2p4 | 4.66 × 105 | 1 |
Sulfur (S) | 16 | [Ne] 3s2 3p4 | 5.20 × 102 | 16 |
Selenium (Se) | 34 | [Ar] 3d10 4s2 4p4 | 9.0 × 10− 2 | 68 |
Tellurium (Te) | 52 | [Kr] 4d10 5s2 5p4 | 9.0 × 10− 2 | 74 |
Polonium (Po) | 84 | [Xe] 4f14 5d10 6s2 6p4 | 2 × 10− 3 | ‐ |