Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Rf Rutherfordium | Ac Actinium |
|---|---|---|
| Atomic Number | 104 higher | 89 higher |
| Symbol | Rf different | Ac different |
| Name | Rutherfordium different | Actinium different |
| Atomic Mass | 267.122 higher | 227.0277 higher |
| Category | Transition Metals different | Actinides different |
| Period | 7 same value | 7 same value |
| Group | 4 higher | 3 higher |
| Block | d-Block different | f-Block different |
| Standard State | Solid same value | Solid same value |
| Electronegativity | — no data | 1.1 no data |
| Atomic Radius | — no data | 260 no data |
| Ionization Energy | — no data | 5.17 no data |
| Electron Affinity | — no data | — no data |
| Oxidation States | +4 different | +3 different |
| Melting Point | — no data | 1324 K (1050.85 °C) no data |
| Boiling Point | — no data | 3471 K (3197.85 °C) no data |
| Density | — no data | 10.07 no data |
| Electron Configuration | [Rn]7s2 5f14 6d2 different | [Rn]7s2 6d1 different |
| Year Discovered | 1964 different | 1899 different |
higher lower
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