Se
Selenium
Atomic Number 34
Nonmetal
Fm
Fermium
Atomic Number 100
Actinide
Bond Analysis
Electronegativity Difference
1.25
Predicted Bond Type
polar covalent
Relationship
Different regions
Property Comparison
| Property | Selenium | Fermium |
|---|---|---|
| Atomic Mass | 78.9710 u | 257.0000 u |
| Electronegativity | 2.55 | 1.30 |
Selenium
- Block
- p-block
- Period
- 4
- Group
- 16
- Phase at STP
- Solid
- Config
- [Ar] 3d10 4s2 4p4
Ratios
Mass Ratio (Se/Fm)
0.307