Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | Kr Krypton | Ar Argon |
|---|---|---|
| Atomic Number | 36 higher | 18 higher |
| Symbol | Kr different | Ar different |
| Name | Krypton different | Argon different |
| Atomic Mass | 83.8 higher | 39.9 higher |
| Category | Noble Gases same value | Noble Gases same value |
| Period | 4 higher | 3 higher |
| Group | 18 same value | 18 same value |
| Block | p-Block same value | p-Block same value |
| Standard State | Gas same value | Gas same value |
| Electronegativity | 3 no data | — no data |
| Atomic Radius | 202 higher | 188 higher |
| Ionization Energy | 14 lower | 15.76 lower |
| Electron Affinity | — no data | — no data |
| Oxidation States | 0 same value | 0 same value |
| Melting Point | 115.79 K (-157.36 °C) higher | 83.8 K (-189.35 °C) higher |
| Boiling Point | 119.93 K (-153.22 °C) higher | 87.3 K (-185.85 °C) higher |
| Density | 0.0037 higher | 0.0018 higher |
| Electron Configuration | [Ar]4s2 3d10 4p6 different | [Ne]3s2 3p6 different |
| Year Discovered | 1898 different | 1894 different |
higher lower
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