Strontium (Sr)

Symbol Sr
Atomic Number 38
Atomic Weight 87.62
Group 2 (alkaline earth metals or beryllium family)
IIA (Old IUPAC), IIA (CAS)
Period 5
Block s

Planetary Bohr Model of Sr
Lewis Dot Diagram of Sr

Physical Properties

Density 2.54 g/cm3
Atomic Volume 33.7 cm3/mole
Atomic Radius 2.15 angstroms
Covalent Radius 192 pm
Radioactive No

States

Melting Point 769.0 °C
Boiling Point 1384.0 °C
Heat Of Fusion 8.2 kJ/mole
Heat Of Vaporization 136.9 kJ/mole

Energy

Electronegativity 1.0 (Pauling Scale)
Electron Affinity -146 kJ/mol
1st Ionization Energy 550 kJ/mol
Specific Heat Capacity 0.3 J g−1 K−1
Thermal Conductivity 35.3 W·m−1·K−1

Electrons and Oxidation

Oxidation States 2
Electrons Per Shell 2 8 18 8 2
Electron Configuration [Kr] 5s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2

Translations

English Strontium
Deutsch Strontium
Lëtzebuergesch Strontium
Nederlands Strontium
Afrikaans Strontium
Frysk Strontium
Dansk Strontium
Svenska Strontium
Norsk Strontium
Íslenska Strontn
Føroysk Strontium
Latin Strontium
Français Strontium
Español Estroncio
Catalana Estronci
Occitana Estronci
Português Estrncio
Galego Estroncio
Italiano Stronzio
Furlan Stronzi
Român Stron?iu
Moldavian Stron?iu
Armãneashte Strontsiumu
Русский ????????
Українска ????????
Byelorussian ????????
Polska Stront
Kaszëbsczi Starnt
Čech Stroncium
Slovenský Stroncium
Slovenščina Stroncij
Hrvatska Stroncij
Српски ???????j??
Bosnian Stroncij
Македонски ?????????
Български ????????
Lietuviškai Stroncis
Lao Stroncijs
Sudovian Str?ncijan
Cymraeg Strontiwm
Gaeilge na hÉireann Strointiam
Gàidhlig na h Strointiam
Gaelg Vanninagh Stroinhum
Cornish Strontyum
Brezhoneg Strontiom
Ελληνική ????????
Shqip Stroncium
Ossetian ????????
Euskera Estrontzioa
Georgian ???????????
Suomi Strontium
Eesti Strontsium
Magyar Stroncium
Türkçe Stronsiyum
Kazakh ????????
Uzbek ????????
Tajik Stronci'
Mongolian ???????
日本語 ??????? [sutoronchiumu]
中国话 ?
ไทย ??????????
Vietnamese Stronti
Bahasa Melayu Strontium, Stronsium
العربيه ?????????
Il-Malti Stronzjum
עברית ?????????
Esperanto Stroncio

History

Discovered In
1790
Discovered By
Adair Crawford
Discovered At
Scotland
Word Origin
Named after the village of "Strontian" in Scotland