Krypton vs Holmium
| Property | Kr Krypton | Ho Holmium |
|---|---|---|
| Atomic number | 36 | 67 |
| Symbol | Kr | Ho |
| Name | Krypton | Holmium |
| Category | noble-gas | lanthanide |
| Standard Atomic Weight | 83.798 u | 164.93033 u |
| Period | 4 | 6 |
| Group | 18 | N/A |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ar]4s23d104p6 | [Xe]6s24f11 |
| Oxidation states | [0, 1, 2] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 3 | 1.23 |
| Electron affinity | -1 eV | 0.338 eV |
| Density | 3.733 kg/m³ | 8800 kg/m³ |
| Melting point | -157.36 °C | 1473.85 °C |
| Boiling point | -153.42 °C | 2699.85 °C |
| Discovery year | 1898 | 1878 |