Sodium vs Arsenic
| Property | Na Sodium | As Arsenic |
|---|---|---|
| Atomic number | 11 | 33 |
| Symbol | Na | As |
| Name | Sodium | Arsenic |
| Category | alkali-metal | metalloid |
| Standard Atomic Weight | 22.989769 u | 74.921595 u |
| Period | 3 | 4 |
| Group | 1 | 15 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Ne]3s1 | [Ar]4s23d104p3 |
| Oxidation states | [-1, 0, 1] | [-3, -2, -1, 0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | 0.93 | 2.18 |
| Electron affinity | 0.5479 eV | 0.81 eV |
| Density | 970 kg/m³ | 5776 kg/m³ |
| Melting point | 97.8 °C | 816.85 °C |
| Boiling point | 882.85 °C | 613.85 °C |
| Discovery year | 1807 | 1250 |