Hydrogen vs Meitnerium
| Property | H Hydrogen | Mt Meitnerium |
|---|---|---|
| Atomic number | 1 | 109 |
| Symbol | H | Mt |
| Name | Hydrogen | Meitnerium |
| Category | nonmetal | transition-metal |
| Standard Atomic Weight | 1.007975 u | 278 u |
| Period | 1 | 7 |
| Group | 1 | 9 |
| Block | s | s |
| Phase at STP | gas | N/A |
| Electron configuration | 1s1 | [Rn]7s25f146d7(calculated) |
| Oxidation states | [-1, 1] | [1, 3, 4, 6, 8, 9] |
| Electronegativity (Pauling) | 2.2 | N/A |
| Electron affinity | 0.75419 eV | 1.7 eV |
| Density | 0.08988 kg/m³ | 3.740000e+4 kg/m³ |
| Melting point | -259.34 °C | -273.15 °C |
| Boiling point | -252.87 °C | -273.15 °C |
| Discovery year | 1766 | 1982 |