84Po208.98243
Polonium
Metalloid
Solid at STP
Period 6Group 16Block PDiscovered 1898
[Xe]6s2 4f14 5d10 6p4
Polonium is a chemical element with symbol Po and atomic number 84, discovered in 1898 by Marie Curie and Pierre Curie. A rare and highly radioactive element with no stable isotopes, polonium is chemically similar to bismuth and tellurium, and it occurs in uranium ores. Applications of polonium are few.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 84 |
| Atomic Mass | 208.98243 u |
| Electron Configuration | [Xe]6s2 4f14 5d10 6p4 |
| Oxidation States | +4, +2 |
| Electronegativity | 2 (Pauling) |
| Atomic Radius | 197 pm |
| Ionization Energy | 8.417 eV |
| Electron Affinity | 1.9 eV |
| Block | P |
Physical Properties
| Appearance | silvery |
| Standard State | Solid |
| Melting Point | 527 K (253.9 °C) |
| Boiling Point | 1235 K (961.9 °C) |
| Density | 9.32 g/cm³ |
| Molar Heat | 26.4 J/(mol·K) |
| CPK Color | #AB5C00 |
Classification
| Category | Metalloid |
| Group Block | Metalloid |
| Period | 6 |
| Group | 16 |
| Block | P |
Discovery
| Year Discovered | 1898 |
| Discovered By | Pierre Curie |
| Electron Shells | 2, 8, 18, 32, 18, 6 |