Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Ce Cerium | Sm Samarium |
|---|---|---|
| Atomic Number | 58 lower | 62 lower |
| Symbol | Ce different | Sm different |
| Name | Cerium different | Samarium different |
| Atomic Mass | 140.116 lower | 150.4 lower |
| Category | Lanthanides same value | Lanthanides same value |
| Period | 6 same value | 6 same value |
| Group | 3 same value | 3 same value |
| Block | f-Block same value | f-Block same value |
| Standard State | Solid same value | Solid same value |
| Electronegativity | 1.12 lower | 1.17 lower |
| Atomic Radius | 235 higher | 229 higher |
| Ionization Energy | 5.539 lower | 5.644 lower |
| Electron Affinity | 0.5 no data | — no data |
| Oxidation States | +4, +3 different | +3, +2 different |
| Melting Point | 1071 K (797.85 °C) lower | 1347 K (1073.85 °C) lower |
| Boiling Point | 3697 K (3423.85 °C) higher | 2067 K (1793.85 °C) higher |
| Density | 6.77 lower | 7.52 lower |
| Electron Configuration | [Xe]6s2 4f1 5d1 different | [Xe]6s2 4f6 different |
| Year Discovered | 1803 different | 1879 different |
higher lower
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