Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Ra Radium | Fr Francium |
|---|---|---|
| Atomic Number | 88 higher | 87 higher |
| Symbol | Ra different | Fr different |
| Name | Radium different | Francium different |
| Atomic Mass | 226.0254 higher | 223.0197 higher |
| Category | Alkaline Earth Metals different | Alkali Metals different |
| Period | 7 same value | 7 same value |
| Group | 2 higher | 1 higher |
| Block | s-Block same value | s-Block same value |
| Standard State | Solid same value | Solid same value |
| Electronegativity | 0.9 higher | 0.7 higher |
| Atomic Radius | 283 lower | 348 lower |
| Ionization Energy | 5.279 higher | 3.9 higher |
| Electron Affinity | — no data | 0.47 no data |
| Oxidation States | +2 different | +1 different |
| Melting Point | 973 K (699.85 °C) higher | 300 K (26.85 °C) higher |
| Boiling Point | 1413 K (1139.85 °C) no data | — no data |
| Density | 5 no data | — no data |
| Electron Configuration | [Rn]7s2 different | [Rn]7s1 different |
| Year Discovered | 1898 different | 1939 different |
higher lower
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