Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Ca Calcium | K Potassium |
|---|---|---|
| Atomic Number | 20 higher | 19 higher |
| Symbol | Ca different | K different |
| Name | Calcium different | Potassium different |
| Atomic Mass | 40.08 higher | 39.0983 higher |
| Category | Alkaline Earth Metals different | Alkali Metals different |
| Period | 4 same value | 4 same value |
| Group | 2 higher | 1 higher |
| Block | s-Block same value | s-Block same value |
| Standard State | Solid same value | Solid same value |
| Electronegativity | 1 higher | 0.82 higher |
| Atomic Radius | 231 lower | 275 lower |
| Ionization Energy | 6.113 higher | 4.341 higher |
| Electron Affinity | — no data | 0.501 no data |
| Oxidation States | +2 different | +1 different |
| Melting Point | 1115 K (841.85 °C) higher | 336.53 K (63.38 °C) higher |
| Boiling Point | 1757 K (1483.85 °C) higher | 1032 K (758.85 °C) higher |
| Density | 1.54 higher | 0.89 higher |
| Electron Configuration | [Ar]4s2 different | [Ar]4s1 different |
| Year Discovered | Ancient different | 1807 different |
higher lower
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