Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Ac Actinium | Ra Radium |
|---|---|---|
| Atomic Number | 89 higher | 88 higher |
| Symbol | Ac different | Ra different |
| Name | Actinium different | Radium different |
| Atomic Mass | 227.0277 higher | 226.0254 higher |
| Category | Actinides different | Alkaline Earth Metals different |
| Period | 7 same value | 7 same value |
| Group | 3 higher | 2 higher |
| Block | f-Block different | s-Block different |
| Standard State | Solid same value | Solid same value |
| Electronegativity | 1.1 higher | 0.9 higher |
| Atomic Radius | 260 lower | 283 lower |
| Ionization Energy | 5.17 lower | 5.279 lower |
| Electron Affinity | — no data | — no data |
| Oxidation States | +3 different | +2 different |
| Melting Point | 1324 K (1050.85 °C) higher | 973 K (699.85 °C) higher |
| Boiling Point | 3471 K (3197.85 °C) higher | 1413 K (1139.85 °C) higher |
| Density | 10.07 higher | 5 higher |
| Electron Configuration | [Rn]7s2 6d1 different | [Rn]7s2 different |
| Year Discovered | 1899 different | 1898 different |
higher lower
Advertisement