Strontium (Sr)

General Properties

Symbol Sr
Atomic Number 38
Atomic Weight 87.62
Group
2 (alkaline earth metals or beryllium family)
IIA (IUPAC), IIA (CAS)
Solid, Paramagnetic, Conductor, Alkaline Earth Metal, Metal, Stable, Natural
Period 5
Block s

Physical Properties

Density 2.54 g/cm3
Atomic Volume 33.7 cm3/mole
Atomic Radius 2.15 angstroms
Covalent Radius 192 pm
Crust Abundance 0.036%
Crystal Structure Cubic: Face centered
Color Silver

States

Melting Point 769.0 °C
Boiling Point 1384.0 °C
Heat of Fusion 8.2 kJ/mol
Heat of Vaporization 136.9 kJ/mol

Energy

Electronegativity 1.0 (Pauling Scale)
Electron Affinity 5.03 kJ/mol
1st Ionization Energy 550 kJ/mol
2nd Ionization Energy 1064.2 kJ/mol
3rd Ionization Energy 4138 kJ/mol
4th Ionization Energy 5500 kJ/mol
5th Ionization Energy 6910 kJ/mol
6th Ionization Energy 8760 kJ/mol
7th Ionization Energy 10230 kJ/mol
8th Ionization Energy 11800 kJ/mol
9th Ionization Energy 15600 kJ/mol
10th Ionization Energy 17100 kJ/mol
11th Ionization Energy 31270 kJ/mol
Specific Heat Capacity 0.3 J g−1 K−1
Thermal Conductivity 35.3 W·m−1·K−1

Electrons & 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
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
 
 
 
 
 
4f
 
 
 
 
 
 
 
5s
↿⇂
5p
 
 
 
5d
 
 
 
 
 
5f
 
 
 
 
 
 
 

Nuclear

Radioactive No

Media

Planetary Bohr Model of Strontium (Sr)
Lewis Dot Diagram of Strontium (Sr)
Description
Soft, malleable, silvery-yellow metal.
Uses
Used in flares and fireworks for crimson color. Strontium-90 is a long lived highly radioactive fallout product of atomic-bomb explosions.
Sources
Found in minerals celestite and strontianite.
Pronounciation (English)
STRON-she-em

Translations

Afrikaans Strontium
Aragonese Estronzio
العربية سترانشيوم
Armãneashte Strontsiumu
Asturian Estronciu
azərbaycan Stronsium
български Стронций
বাংলা স্ট্রনসিয়াম
brezhoneg Strontiom
bosanski Stroncij[um]
Byelorussian Стронцый
Cebuano Estronsyo
čeština Stroncium
Chuvash Стронци
Cymraeg Estronci
dansk Strontium
Deutsch Strontium
Ελληνικά Στροντιο
English Strontium
esperanto Stroncio
español Estroncio
eesti Strontsium
euskara Estrontzioa
فارسی استرونسیم
suomi Strontium
føroyskt Strontium
français Strontium
Friulian Stronzi
Western Frisian Strontium
Gaeilge Strointiam
Scottish Gaelic Strointiam
galego Estroncio
ગુજરાતી સ્ટ્રૉંટીયમનો
Gaelg Stroinçhum
Hakka Sṳ̂ (鍶)
עברית סטרונציום
हिंदी स्ट्रोन्सियम
hrvatski Stroncij
magyar Stroncium
հայերեն Ստրոնցիում
Bahasa Indonesia Strontium
íslenska Strontín
italiano Stronzio
日本語 ストロンチウム
ქართული სტორცინიუმი
کٲشُر Starnt
қазақ тілі Стронций
한국어 스트논듐 or 스트론튬
Kurdish Stronsiyûm
Komi Стронций
kernewek Strontyum
кыргызча Стронций
Latin Strontium
Luxembourgish Strontium
Lombard Strúnzi
lingála Sitotu
lietuvių Stroncis
latviešu Stroncijs
Mari Стронций
Maori Strontium
македонски Стронциум
മലയാളം സ്ട്രോണ്‍ഷിയം
монгол Стронци
Мокшан Стронти
Bahasa Melayu Strontium
Malti Stronzju[m]
Nahuatl Estroncio
Nederlands Strontium
norsk Strontium
Occitan Estronci
Ossetic Стронций
polski Stront
português Estrôncio
Quechua Istronsyu
română Stronţiu
русский Стронций
slovenčina Stroncium
slovenščina Stroncij
Samoan Strontimi
Samogitian Struoncis
Shqip Stroncium, ²Strontiumi
Српски Стронцијум
Southern Sotho Strontiamo
svenska Strontium
Kiswahili Stronti
தமிழ் ஸ்ட்ரோண்டியம்
Tajik Стронсий
ไทย สทรอนเชียม
Türkçe Stronsiyum
Uyghur سترونتسىي
українська Стронцій
oʻzbekcha Stronsiy
Tiếng Việt Stronti
Võro Strontsium
中文

History

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