Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | O Oxygen | Fe Iron |
|---|---|---|
| Atomic Number | 8 lower | 26 lower |
| Symbol | O different | Fe different |
| Name | Oxygen different | Iron different |
| Atomic Mass | 15.999 lower | 55.84 lower |
| Category | Reactive Nonmetals different | Transition Metals different |
| Period | 2 lower | 4 lower |
| Group | 16 higher | 8 higher |
| Block | p-Block different | d-Block different |
| Standard State | Gas different | Solid different |
| Electronegativity | 3.44 higher | 1.83 higher |
| Atomic Radius | 152 lower | 194 lower |
| Ionization Energy | 13.618 higher | 7.902 higher |
| Electron Affinity | 1.461 higher | 0.163 higher |
| Oxidation States | -2 different | +3, +2 different |
| Melting Point | 54.36 K (-218.79 °C) lower | 1811 K (1537.85 °C) lower |
| Boiling Point | 90.2 K (-182.95 °C) lower | 3134 K (2860.85 °C) lower |
| Density | 0.0014 lower | 7.874 lower |
| Electron Configuration | [He]2s2 2p4 different | [Ar]4s2 3d6 different |
| Year Discovered | 1774 different | Ancient different |
higher lower
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