Compare Elements
Compare two chemical elements side by side across 19 atomic and physical properties.
| Property | He Helium | Og Oganesson |
|---|---|---|
| Atomic Number | 2 lower | 118 lower |
| Symbol | He different | Og different |
| Name | Helium different | Oganesson different |
| Atomic Mass | 4.0026 lower | 295.216 lower |
| Category | Noble Gases same value | Noble Gases same value |
| Period | 1 lower | 7 lower |
| Group | 18 same value | 18 same value |
| Block | p-Block same value | p-Block same value |
| Standard State | Gas different | Expected to be a gas different |
| Electronegativity | — no data | — no data |
| Atomic Radius | 140 no data | — no data |
| Ionization Energy | 24.587 no data | — no data |
| Electron Affinity | — no data | — no data |
| Oxidation States | 0 different | +6, +4, +2, +1, 0, -1 different |
| Melting Point | 0.95 K (-272.2 °C) no data | — no data |
| Boiling Point | 4.22 K (-268.93 °C) no data | — no data |
| Density | 0.0002 no data | — no data |
| Electron Configuration | 1s2 different | [Rn]7s2 7p6 5f14 6d10 (predicted) different |
| Year Discovered | 1868 different | 2006 different |
higher lower
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