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silvery white metallic
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan strontium, Sr, 38
Paglitok /ˈstrɒnʃəm/
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all-sh(ee)-əm]];
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all-tee-əm]]
Kategoriyang elemento puthaw
Group, period, block 25, s
Gibug-aton sa atomo 87.62
Kontorno sa elektron [Kr] 5s2
2, 8, 18, 8, 2
Electron shells of strontium (2, 8, 18, 8, 2)
Pagkadiskobre William Cruickshank (1787)
First isolation Humphry Davy (1808)
Physical properties
Phase magahi
Density (near r.t.) 2.64 g·cm−3
Liquid density at m.p. 2.375 g·cm−3
Melting point 1050 K, 777 °C, 1431 °F
Boiling point 1655 K, 1382 °C, 2520 °F
Heat of fusion 7.43 kJ·mol−1
Heat of vaporization 136.9 kJ·mol−1
Molar heat capacity 26.4 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 796 882 990 1139 1345 1646
Atomic properties
Oxidation states 2, 1[1] (strongly basic oxide)
Electronegativity 0.95 (Pauling scale)
Ionization energies 1st: 549.5 kJ·mol−1
2nd: 1064.2 kJ·mol−1
3rd: 4138 kJ·mol−1
Atomic radius 215 pm
Covalent radius 195±10 pm
Van der Waals radius 249 pm
Crystal structure face-centered cubic
Strontium has a face-centered cubic crystal structure
Magnetic ordering paramagnetic
Electrical resistivity (20 °C) 132 nΩ·m
Thermal conductivity 35.4 W·m−1·K−1
Thermal expansion (25 °C) 22.5 µm·m−1·K−1
Young's modulus 15.7 GPa
Shear modulus 6.03 GPa
Poisson ratio 0.28
Mohs hardness 1.5
CAS registry number 7440-24-6
Most stable isotopes
Main article: Isotopes of strontium
iso NA half-life DM DE (MeV) DP
82Sr syn 25.36 d ε - 82Rb
83Sr syn 1.35 d ε - 83Rb
β+ 1.23 83Rb
γ 0.76, 0.36 -
84Sr 0.56% 84Sr is stable with 46 neutrons
85Sr syn 64.84 d ε - 85Rb
γ 0.514D -
86Sr 9.86% 86Sr is stable with 48 neutrons
87Sr 7.0% 87Sr is stable with 49 neutrons
88Sr 82.58% 88Sr is stable with 50 neutrons
89Sr syn 50.52 d ε 1.49 89Rb
β 0.909D 89Y
90Sr trace 28.90 y β 0.546 90Y
· r

Ang estronsyo or estrontyo (Iningles strontium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Sr ug kaiphan nga atomik 38. Ang estrontyo mao ang puthaw.

References[usba | usba ang wikitext]

  1. P. Colarusso et al. (1996). "High-Resolution Infrared Emission Spectrum of Strontium Monofluoride". J. Molecular Spectroscopy 175: 158. doi:10.1006/jmsp.1996.0019,