Stronsyum
38
Sr
Grup
2
Periyot
5
Blok
s
Protonlar
Elektronlar
Nötronlar
38
38
50
Temel Özellikleri
Atom numarası
38
Atom ağırlığı
87,62
Kütle Numarası
88
Kategori
Alkali toprak metalleri
Renk
Gümüşi
Radyoaktif
Hayir
Named after Strontian, a town in Scotland
Kristal yapısı
Yüzey merkezli kübik
Tarihi
Strontium was recognized as a new element in 1790 when Adair Crawford and his colleague William Cruickshank analyzed a mineral sample from a lead mine near Strontian, Scotland.
The element was eventually isolated by Sir Humphry Davy in 1808.
The isolation was done by the electrolysis of a mixture containing strontium chloride and mercuric oxide.
The element was eventually isolated by Sir Humphry Davy in 1808.
The isolation was done by the electrolysis of a mixture containing strontium chloride and mercuric oxide.
Enerji seviyesi başına Elektronlar
2, 8, 18, 8, 2
Elektron dizilimi
[Kr] 5s2
Strontium metal turns yellow when exposed to air
Fiziksel Özellikleri
Faz
Katı
Yoğunluk
2,64 g/cm3
Ergime noktası
1050,15 K | 777 °C | 1430,6 °F
Kaynama noktası
1655,15 K | 1382 °C | 2519,6 °F
Ergime ısısı
8 kJ/mol
Buharlaşma ısısı
137 kJ/mol
Isı kapasitesi
0,301 J/g·K
Dünya kabuğundaki bulunulabilirliği
0,036%
Evrendeki bulunulabilirliği
4×10-6%
Resim kaynağı: Wikimedia Commons (Alchemist-hp)
The chemical element strontium as a synthetic made crystals, sealed under argon in a glas ampoule
CAS Numarası
7440-24-6
PubChem CID Numarası
5359327
Atom Özellikleri
Atom yarıçapı
215 pm
Kovalent yarıçapı
195 pm
Elektronegatifliği
0,95 (Pauling ölçeği)
İyonlaşma enerjisi
5,6949 eV
Atomik Hacim
33,7 cm3/mol
Isıl iletkenlik
0,353 W/cm·K
Yükseltgenme seviyeleri
1, 2
Uygulamalar
The primary use for strontium is in glass for color television cathode ray tubes.
Strontium salts are used in flares and fireworks for a crimson color.
Strontium chloride is used in toothpaste for sensitive teeth.
Strontium oxide is used to improve the quality of pottery glazes.
Strontium salts are used in flares and fireworks for a crimson color.
Strontium chloride is used in toothpaste for sensitive teeth.
Strontium oxide is used to improve the quality of pottery glazes.
Strontium's non-radioactive isotopes are considered non-toxic
İzotoplar
Kararlı izotoplar
84Sr, 86Sr, 87Sr, 88SrKararsız izotoplar
73Sr, 74Sr, 75Sr, 76Sr, 77Sr, 78Sr, 79Sr, 80Sr, 81Sr, 82Sr, 83Sr, 85Sr, 89Sr, 90Sr, 91Sr, 92Sr, 93Sr, 94Sr, 95Sr, 96Sr, 97Sr, 98Sr, 99Sr, 100Sr, 101Sr, 102Sr, 103Sr, 104Sr, 105Sr