Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Na Sodium | Rb Rubidium |
|---|---|---|
| Atomic Number | 11 lower | 37 lower |
| Symbol | Na different | Rb different |
| Name | Sodium different | Rubidium different |
| Atomic Mass | 22.9898 lower | 85.468 lower |
| Category | Alkali Metals same value | Alkali Metals same value |
| Period | 3 lower | 5 lower |
| 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 | 0.93 higher | 0.82 higher |
| Atomic Radius | 227 lower | 303 lower |
| Ionization Energy | 5.139 higher | 4.177 higher |
| Electron Affinity | 0.548 higher | 0.468 higher |
| Oxidation States | +1 same value | +1 same value |
| Melting Point | 370.95 K (97.8 °C) higher | 312.46 K (39.31 °C) higher |
| Boiling Point | 1156 K (882.85 °C) higher | 961 K (687.85 °C) higher |
| Density | 0.97 lower | 1.53 lower |
| Electron Configuration | [Ne]3s1 different | [Kr]5s1 different |
| Year Discovered | 1807 different | 1861 different |
higher lower
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