Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Sc Scandium | Ac Actinium |
|---|---|---|
| Atomic Number | 21 lower | 89 lower |
| Symbol | Sc different | Ac different |
| Name | Scandium different | Actinium different |
| Atomic Mass | 44.9559 lower | 227.0277 lower |
| Category | Transition Metals different | Actinides different |
| Period | 4 lower | 7 lower |
| Group | 3 same value | 3 same value |
| Block | d-Block different | f-Block different |
| Standard State | Solid same value | Solid same value |
| Electronegativity | 1.36 higher | 1.1 higher |
| Atomic Radius | 211 lower | 260 lower |
| Ionization Energy | 6.561 higher | 5.17 higher |
| Electron Affinity | 0.188 no data | — no data |
| Oxidation States | +3 same value | +3 same value |
| Melting Point | 1814 K (1540.85 °C) higher | 1324 K (1050.85 °C) higher |
| Boiling Point | 3109 K (2835.85 °C) lower | 3471 K (3197.85 °C) lower |
| Density | 2.99 lower | 10.07 lower |
| Electron Configuration | [Ar]4s2 3d1 different | [Rn]7s2 6d1 different |
| Year Discovered | 1879 different | 1899 different |
higher lower
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