Atomic number 54 · noble gas · Atomic mass 131.29 u
| Atomic Number | 54 |
| Atomic Mass | 131.2900 u |
| Category | noble gas / 稀有气体 |
| Group | 18 |
| Period | 5 |
| Block | P |
| Electron Configuration | [Kr] 4d¹⁰ 5s² 5p⁶ |
| Electronegativity (Pauling) | 2.6 |
| Phase at STP | Gas |
| Density | 0.005894 g/cm³ |
| Year Discovered | 1898 |
Explore all 118 elements or calculate molar mass of any compound
Periodic Table → Molar Mass Calculator →