Promethium (Pm)

Symbol Pm
Atomic Number 61
Atomic Weight (145)
Group (Lanthanoids)
Period 6
Block f

Planetary Bohr Model of Pm
Lewis Dot Diagram of Pm

Physical Properties

Density 7.26 g/cm3
Atomic Volume 22.4 cm3/mole
Atomic Radius angstroms
Covalent Radius pm
Radioactive Yes

States

Melting Point 1042.0 °C
Boiling Point 3000.0 °C
Heat Of Fusion kJ/mole
Heat Of Vaporization kJ/mole

Energy

Electronegativity (Pauling Scale)
Electron Affinity kJ/mol
1st Ionization Energy 540 kJ/mol
Specific Heat Capacity J g−1 K−1
Thermal Conductivity 17.9 W·m−1·K−1

Electrons and Oxidation

Oxidation States 3
Electrons Per Shell 2 8 18 23 8 2
Electron Configuration [Xe] 4f5 6s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f5 6s2

Translations

English Promethium
Deutsch Promethium
Lëtzebuergesch Promethium
Nederlands Promethium
Afrikaans Promethium
Frysk Promethium
Dansk Promethium
Svenska Prometium
Norsk Promethium
Íslenska Prmetn or Prmen
Føroysk Promethium
Latin Promethium
Français Promthium
Español Promecio
Catalana Prometi
Occitana Prometi
Português Promcio
Galego Prometio
Italiano Promezio
Furlan Prometi
Român Prome?iu
Moldavian Prome?iu
Armãneashte Prometiumu
Русский ????????
Українска ????????
Byelorussian ????????
Polska Promet
Kaszëbsczi Promet
Čech Promethium
Slovenský Promethium
Slovenščina Prometij
Hrvatska Prometij
Српски ???????j??
Bosnian Prometij
Македонски ?????????
Български ????????
Lietuviškai Prometis
Lao Prometijs
Sudovian Pr?metijan
Cymraeg Promethiwm
Gaeilge na hÉireann Prmitiam
Gàidhlig na h Promitiam
Gaelg Vanninagh Promaihum
Cornish Promethyum
Brezhoneg Prometiom
Ελληνική ?????????
Shqip Promet
Ossetian ????????
Euskera Prometioa
Georgian ??????????
Suomi Prometium
Eesti Promeetium
Magyar Promcium
Türkçe Prometyum
Kazakh ????????
Uzbek ????????
Tajik Prometi'
Mongolian ???????
日本語 ?????? [puromechiumu]
中国话 ?
ไทย ??????????
Vietnamese Prometi
Bahasa Melayu Prometium
العربيه ?????????
Il-Malti Promizjum
עברית ????????
Esperanto Promecio

History

Discovered In
1945
Discovered By
J. A. Marinsky, Lawrence Glendenin, Charles D. Coryell
Discovered At
United States
Word Origin
Named after "Prometheus" in Greek mythology, who stole fire from the gods