Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | In Indium | Tl Thallium |
|---|---|---|
| Atomic Number | 49 lower | 81 lower |
| Symbol | In different | Tl different |
| Name | Indium different | Thallium different |
| Atomic Mass | 114.818 lower | 204.383 lower |
| Category | Post-transition Metals same value | Post-transition Metals same value |
| Period | 5 lower | 6 lower |
| Group | 13 same value | 13 same value |
| Block | p-Block same value | p-Block same value |
| Standard State | Solid same value | Solid same value |
| Electronegativity | 1.78 higher | 1.62 higher |
| Atomic Radius | 193 lower | 196 lower |
| Ionization Energy | 5.786 lower | 6.108 lower |
| Electron Affinity | 0.3 higher | 0.2 higher |
| Oxidation States | +3 different | +3, +1 different |
| Melting Point | 429.75 K (156.6 °C) lower | 577 K (303.85 °C) lower |
| Boiling Point | 2345 K (2071.85 °C) higher | 1746 K (1472.85 °C) higher |
| Density | 7.31 lower | 11.8 lower |
| Electron Configuration | [Kr]5s2 4d10 5p1 different | [Xe]6s2 4f14 5d10 6p1 different |
| Year Discovered | 1863 different | 1861 different |
higher lower
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