Properties

CAS Number7440-11-1
PubChem CIDna
Atomic Radius-
Atomic Volume-
Atomic Weight[258]
Blockf
Boiling Point-
Bulk Modulus
CategoryActinides
Crystal Structure
Color
Covalent Radius-
Density-
Electrical Resistivity
Electron Configuration[Rn] 5f13 7s2
Electrons per shell2, 8, 18, 32, 31, 8, 2
Electronegativity1.3
Electrons101
Groupna
Heat of Fusionna
Heat of Vaporizationna
Ionization Potential6.58
Magnetic Ordering
Magnetic Susceptibility
Mass[258]
Mass Number101
Melting Point826.85
NameMendelevium
Neutrons157
Atomic Number258
Oxidation States2, 3
Period7
PhaseSolid
Poisson Ratio
Protons101
Shear Modulus
Specific Heat Capacity-
SymbolMd
Thermal Conductivity0.1
Van der Waals radius
Young's Modulus
Abundance
Abundance in Earth's crustna
Abundance in Universena
Md Mendelevium 101 (258) 7 f 101 [Rn] 5f13 7s2 2 8 18 32 31 8 2 None Unknown 1.3 {"1":"635"} 635 +3,2 10.0 1 51.5 d 74.31d AlphaEmission Actinide, Radioactive, Synthetic men-deh-LEE-vi-em Synthetic radioactive metal. It has no significant commercial applications. Made by bombarding einsteinium with helium ions. 0JlshAo8DuE Mendelevium
Polonium was discovered by Marie and Pierre Curie in 1898 in Paris.

This element was the first one discovered by the Curies while they were investigating the cause of pitchblende radioactivity.

The dangers of working with radioactive elements were not known when the Curies made their discoveries. Named after Poland, native country of Madam Curie 101 1955 Glenn T. Seaborg, Albert Ghiorso, Bernard Harvey, Gregory Choppin, Stanley G. Thompson USA Named after Dimitri "Mendeleev", the Russian chemist who contributed so much to the development of the periodic table

Isotopes of Polonium

Standard Atomic Weight

Stable Isotopes

Unstable Isotopes

245Md 246Md 247Md 248Md 249Md 250Md 251Md 252Md 253Md 254Md 255Md 256Md 257Md 258Md 259Md 260Md 261Md 262Md

Polonium is highly dangerous and radioactive
Polonium is obtained by irradiating bismuth with high-energy neutrons or protons
Polonium is used to eliminate static electricity produced during processes such as rolling paper, wire and sheet metal.

Polonium can be mixed or alloyed with beryllium to provide a source of neutrons.

It is also used in anti-static brushes to eliminate dust on photographic film.