Lithium vs Argon
| Property | Li Lithium | Ar Argon |
|---|---|---|
| Atomic number | 3 | 18 |
| Symbol | Li | Ar |
| Name | Lithium | Argon |
| Category | alkali-metal | noble-gas |
| Standard Atomic Weight | 6.9675 u | 39.948 u |
| Period | 2 | 3 |
| Group | 1 | 18 |
| Block | s | p |
| Phase at STP | solid | gas |
| Electron configuration | [He]2s1 | [Ne]3s23p6 |
| Oxidation states | [1] | [0] |
| Electronegativity (Pauling) | 0.98 | N/A |
| Electron affinity | 0.61804 eV | -1 eV |
| Density | 534 kg/m³ | 1.7837 kg/m³ |
| Melting point | 180.5 °C | -189.35 °C |
| Boiling point | 1341.85 °C | -185.85 °C |
| Discovery year | 1817 | 1894 |