Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Ra Radium | Ca Calcium |
|---|---|---|
| Atomic Number | 88 higher | 20 higher |
| Symbol | Ra different | Ca different |
| Name | Radium different | Calcium different |
| Atomic Mass | 226.0254 higher | 40.08 higher |
| Category | Alkaline Earth Metals same value | Alkaline Earth Metals same value |
| Period | 7 higher | 4 higher |
| Group | 2 same value | 2 same value |
| Block | s-Block same value | s-Block same value |
| Standard State | Solid same value | Solid same value |
| Electronegativity | 0.9 lower | 1 lower |
| Atomic Radius | 283 higher | 231 higher |
| Ionization Energy | 5.279 lower | 6.113 lower |
| Electron Affinity | — no data | — no data |
| Oxidation States | +2 same value | +2 same value |
| Melting Point | 973 K (699.85 °C) lower | 1115 K (841.85 °C) lower |
| Boiling Point | 1413 K (1139.85 °C) lower | 1757 K (1483.85 °C) lower |
| Density | 5 higher | 1.54 higher |
| Electron Configuration | [Rn]7s2 different | [Ar]4s2 different |
| Year Discovered | 1898 different | Ancient different |
higher lower
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