Atomic number 10 · noble gas · Atomic mass 20.18 u
| Atomic Number | 10 |
| Atomic Mass | 20.1800 u |
| Category | noble gas / 稀有气体 |
| Group | 18 |
| Period | 2 |
| Block | P |
| Electron Configuration | [He] 2s² 2p⁶ |
| Electronegativity (Pauling) | — |
| Phase at STP | Gas |
| Density | 0.0009 g/cm³ |
| Year Discovered | 1898 |
Explore all 118 elements or calculate molar mass of any compound
Periodic Table → Molar Mass Calculator →