Krypton vs Gold
| Property | Kr Krypton | Au Gold |
|---|---|---|
| Atomic number | 36 | 79 |
| Symbol | Kr | Au |
| Name | Krypton | Gold |
| Category | noble-gas | transition-metal |
| Standard Atomic Weight | 83.798 u | 196.966569 u |
| Period | 4 | 6 |
| Group | 18 | 11 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ar]4s23d104p6 | [Xe]6s14f145d10 |
| Oxidation states | [0, 1, 2] | [-3, -2, -1, 0, 1, 2, 3, 5] |
| Electronegativity (Pauling) | 3 | 2.54 |
| Electron affinity | -1 eV | 2.3086 eV |
| Density | 3.733 kg/m³ | 1.928200e+4 kg/m³ |
| Melting point | -157.36 °C | 1064.18 °C |
| Boiling point | -153.42 °C | 2855.85 °C |
| Discovery year | 1898 | N/A |