Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Cs Cesium | Fr Francium |
|---|---|---|
| Atomic Number | 55 lower | 87 lower |
| Symbol | Cs different | Fr different |
| Name | Cesium different | Francium different |
| Atomic Mass | 132.9055 lower | 223.0197 lower |
| Category | Alkali Metals same value | Alkali Metals same value |
| Period | 6 lower | 7 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 | 0.79 higher | 0.7 higher |
| Atomic Radius | 343 lower | 348 lower |
| Ionization Energy | 3.894 lower | 3.9 lower |
| Electron Affinity | 0.472 higher | 0.47 higher |
| Oxidation States | +1 same value | +1 same value |
| Melting Point | 301.59 K (28.44 °C) higher | 300 K (26.85 °C) higher |
| Boiling Point | 944 K (670.85 °C) no data | — no data |
| Density | 1.93 no data | — no data |
| Electron Configuration | [Xe]6s1 different | [Rn]7s1 different |
| Year Discovered | 1860 different | 1939 different |
higher lower
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