Silicon vs Francium
| Property | Si Silicon | Fr Francium |
|---|---|---|
| Atomic number | 14 | 87 |
| Symbol | Si | Fr |
| Name | Silicon | Francium |
| Category | metalloid | alkali-metal |
| Standard Atomic Weight | 28.085 u | 223 u |
| Period | 3 | 7 |
| Group | 14 | 1 |
| Block | p | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ne]3s23p2 | [Rn]7s1 |
| Oxidation states | [-4, -3, -2, -1, 0, 1, 2, 3, 4] | [1] |
| Electronegativity (Pauling) | 1.9 | 0.7 |
| Electron affinity | 1.385 eV | 0.491 eV |
| Density | 2329.6 kg/m³ | 1870 kg/m³ |
| Melting point | 1413.85 °C | 26.85 °C |
| Boiling point | 3264.85 °C | -273.15 °C |
| Discovery year | 1824 | 1939 |