About the sample | This is a commercial sample bought from USA. The exhibited polonium belongs to our colleague Miha Bukleski. 210Po is an alpha emitter that has a half-life of 138.4 days. It decays directly to its stable daughter isotope, 206Pb. A measurement of radioactivity of this sample, at different distance, on 25 of January 2023, has been conducted with our colleague Lambe Barandovski . Distance/cm Radioactivity /Bq  In the International System of units (SI), the becquerel (Bq) is the unit of radioactivity. One Bq is 1 disintegration per second. The next measurement of the radioactivity of this sample is scheduled for 25 of January 2024. |
| Z | 84 |
| ρ / g/cm3 | 9.196 |
| tt, mp / °C | 254 |
| tv, bp / °C | 962 |
| Ar | 209 (longest lived isotope) |
| Electronegativity, (X) | 2 |
| Crystal structure | Cubic |
| Extended information | https://www.webelements.com/Polonium/ |