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