Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | O Oxygen | Be Beryllium |
|---|---|---|
| Atomic Number | 8 higher | 4 higher |
| Symbol | O different | Be different |
| Name | Oxygen different | Beryllium different |
| Atomic Mass | 15.999 higher | 9.0122 higher |
| Category | Reactive Nonmetals different | Alkaline Earth Metals different |
| Period | 2 same value | 2 same value |
| Group | 16 higher | 2 higher |
| Block | p-Block different | s-Block different |
| Standard State | Gas different | Solid different |
| Electronegativity | 3.44 higher | 1.57 higher |
| Atomic Radius | 152 lower | 153 lower |
| Ionization Energy | 13.618 higher | 9.323 higher |
| Electron Affinity | 1.461 no data | — no data |
| Oxidation States | -2 different | +2 different |
| Melting Point | 54.36 K (-218.79 °C) lower | 1560 K (1286.85 °C) lower |
| Boiling Point | 90.2 K (-182.95 °C) lower | 2744 K (2470.85 °C) lower |
| Density | 0.0014 lower | 1.85 lower |
| Electron Configuration | [He]2s2 2p4 different | [He]2s2 different |
| Year Discovered | 1774 different | 1798 different |
higher lower
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