84
Po
209
Polonium (Po)
Element 84 · Period 6 · Group 16
post-transition
solid at room temp
p-block
radioactive
About Polonium
Highly radioactive. Discovered by Marie Curie. Used in antistatic devices and as neutron source.
Physical Properties
Atomic Mass
209 u
State at 25°C
Solid
Melting Point
254 °C
Boiling Point
962 °C
Density
9.196 g/cm³
Magnetism
Diamagnetic
Atomic Properties
Electron Configuration
[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁴
Electron Shells
2, 8, 18, 32, 18, 6
Electronegativity
2.0
Atomic Radius
135 pm
Ionization Energy
812 kJ/mol
Oxidation States
+2, +4
Discovery & History
Discovered By
Marie Curie
Discovery Year
1898
Named By
Marie Curie
Name origin: Poland (Curie's homeland)
Frequently Asked Questions
- Is Polonium a metal, nonmetal, or metalloid?
- Polonium is classified as a post-transition.
- What state is Polonium in at room temperature?
- Polonium is a solid at standard room temperature (25°C).
- What is the atomic mass of Polonium?
- Polonium has an atomic mass of 209 atomic mass units (u).
- Who discovered Polonium?
- Polonium was discovered by Marie Curie in 1898.
- Where is Polonium on the periodic table?
- Polonium is element number 84, located in period 6 and group 16.