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