Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Cs Cesium | K Potassium |
|---|---|---|
| Atomic Number | 55 higher | 19 higher |
| Symbol | Cs different | K different |
| Name | Cesium different | Potassium different |
| Atomic Mass | 132.9055 higher | 39.0983 higher |
| Category | Alkali Metals same value | Alkali Metals same value |
| Period | 6 higher | 4 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 | 0.79 lower | 0.82 lower |
| Atomic Radius | 343 higher | 275 higher |
| Ionization Energy | 3.894 lower | 4.341 lower |
| Electron Affinity | 0.472 lower | 0.501 lower |
| Oxidation States | +1 same value | +1 same value |
| Melting Point | 301.59 K (28.44 °C) lower | 336.53 K (63.38 °C) lower |
| Boiling Point | 944 K (670.85 °C) lower | 1032 K (758.85 °C) lower |
| Density | 1.93 higher | 0.89 higher |
| Electron Configuration | [Xe]6s1 different | [Ar]4s1 different |
| Year Discovered | 1860 different | 1807 different |
higher lower
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