Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | K Potassium | Na Sodium |
|---|---|---|
| Atomic Number | 19 higher | 11 higher |
| Symbol | K different | Na different |
| Name | Potassium different | Sodium different |
| Atomic Mass | 39.0983 higher | 22.9898 higher |
| Category | Alkali Metals same value | Alkali Metals same value |
| Period | 4 higher | 3 higher |
| Group | 1 same value | 1 same value |
| Block | s-Block same value | s-Block same value |
| Standard State | Solid same value | Solid same value |
| Electronegativity | 0.82 lower | 0.93 lower |
| Atomic Radius | 275 higher | 227 higher |
| Ionization Energy | 4.341 lower | 5.139 lower |
| Electron Affinity | 0.501 lower | 0.548 lower |
| Oxidation States | +1 same value | +1 same value |
| Melting Point | 336.53 K (63.38 °C) lower | 370.95 K (97.8 °C) lower |
| Boiling Point | 1032 K (758.85 °C) lower | 1156 K (882.85 °C) lower |
| Density | 0.89 lower | 0.97 lower |
| Electron Configuration | [Ar]4s1 different | [Ne]3s1 different |
| Year Discovered | 1807 same value | 1807 same value |
higher lower
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