Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | K Potassium | H Hydrogen |
|---|---|---|
| Atomic Number | 19 higher | 1 higher |
| Symbol | K different | H different |
| Name | Potassium different | Hydrogen different |
| Atomic Mass | 39.0983 higher | 1.008 higher |
| Category | Alkali Metals different | Reactive Nonmetals different |
| Period | 4 higher | 1 higher |
| Group | 1 same value | 1 same value |
| Block | s-Block same value | s-Block same value |
| Standard State | Solid different | Gas different |
| Electronegativity | 0.82 lower | 2.2 lower |
| Atomic Radius | 275 higher | 120 higher |
| Ionization Energy | 4.341 lower | 13.598 lower |
| Electron Affinity | 0.501 lower | 0.754 lower |
| Oxidation States | +1 different | +1, -1 different |
| Melting Point | 336.53 K (63.38 °C) higher | 13.81 K (-259.34 °C) higher |
| Boiling Point | 1032 K (758.85 °C) higher | 20.28 K (-252.87 °C) higher |
| Density | 0.89 higher | 0.0001 higher |
| Electron Configuration | [Ar]4s1 different | 1s1 different |
| Year Discovered | 1807 different | 1766 different |
higher lower
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