Stroncio
38
Sr
Grupo
2
Perio
5
Bloko
s
Protonoj
Elektronoj
Neŭtronoj
38
38
50
Ĝeneralaj Propraĵoj
Atoma Nombro
38
Atommaso
87,62
Amasa Nombro
88
Kategorio
Teralkalaj metaloj
Koloro
Arĝento
Radioaktiva
Ne
Named after Strontian, a town in Scotland
Kristala Strukturo
Vizaĝo Centrita Kubo
Historio
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.
Elektronoj per ŝelo
2, 8, 18, 8, 2
Elektrona Agordo
[Kr] 5s2
Strontium metal turns yellow when exposed to air
Fizikaj Propraĵoj
Fazo
Solido
Denso
2,64 g/cm3
Fandpunkto
1050,15 K | 777 °C | 1430,6 °F
Bolpunkto
1655,15 K | 1382 °C | 2519,6 °F
Varmo de Fuzio
8 kJ/mol
Varmo de Vaporiĝo
137 kJ/mol
Specifa Varmo Kapacito
0,301 J/g·K
Krusta Abundo
0,036%
Universa Abundo
4×10-6%
Bildaj kreditoj: Wikimedia Commons (Alchemist-hp)
The chemical element strontium as a synthetic made crystals, sealed under argon in a glas ampoule
CAS Nombro
7440-24-6
PubChem Kunmetita Identiga Nombro
5359327
Atomaj Propraĵoj
Atoma Radiuso
215 pm
Kovalenta Radiuso
195 pm
Elektronegativeco
0,95 (Pauling-skalo)
Potencialo de jonigo
5,6949 eV
Atoma Volumo
33,7 cm3/mol
Termika Kondukto
0,353 W/cm·K
Oksidaj Ŝtatoj
1, 2
Aplikoj
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
Izotopoj
Stabilaj Izotopoj
84Sr, 86Sr, 87Sr, 88SrMalstabilaj Isotopoj
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