Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Mg Magnesium | Be Beryllium |
|---|---|---|
| Atomic Number | 12 higher | 4 higher |
| Symbol | Mg different | Be different |
| Name | Magnesium different | Beryllium different |
| Atomic Mass | 24.305 higher | 9.0122 higher |
| Category | Alkaline Earth Metals same value | Alkaline Earth Metals same value |
| Period | 3 higher | 2 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 | 1.31 lower | 1.57 lower |
| Atomic Radius | 173 higher | 153 higher |
| Ionization Energy | 7.646 lower | 9.323 lower |
| Electron Affinity | — no data | — no data |
| Oxidation States | +2 same value | +2 same value |
| Melting Point | 923 K (649.85 °C) lower | 1560 K (1286.85 °C) lower |
| Boiling Point | 1363 K (1089.85 °C) lower | 2744 K (2470.85 °C) lower |
| Density | 1.74 lower | 1.85 lower |
| Electron Configuration | [Ne]3s2 different | [He]2s2 different |
| Year Discovered | 1808 different | 1798 different |
higher lower
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