84Po209
Polonium
Post-transition metal · element 84 · group 16, period 6
Quick facts
| Symbol | Po |
|---|---|
| Atomic number | 84 |
| Relative atomic mass | 209 |
| Category | Post-transition metal |
| Position | group 16, period 6 |
| State at 20 °C | Solid |
| Melting point | 254 °C |
| Boiling point | 962 °C |
| Density | 9.2 g/cm³ |
| Electronegativity | 2 |
| Electron configuration | [Xe] 4f14 5d10 6s2 6p4 |
About Polonium
Polonium has the symbol Po and atomic number 84, which means every polonium atom has 84 protons in its nucleus and, in a neutral atom, 84 electrons. At room temperature it is a solid.
Post-transition metals are softer metals found to the right of the transition metals, with lower melting points.
It melts at 254 °C and boils at 962 °C.
Explore it
See where polonium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.