کينډۍ:Infobox strontium

Strontium,  ₃₈Sr

عمومي خواص
Pronunciation	/ˈstrɒnʃəm,_ʔʃiəm,_ʔtiəm/ STRON-sh(ee)-əm or STRON-tee-əm
Appearance	silvery white metallic; with a pale yellow tint
Strontium په دوراني جدول کې
Ca ↑ Sr ↓ Ba rubidium ← strontium → yttrium ‍
اټومي شمیره (Z)	38
گروپ, پیریود	group 2 (alkaline earth metals), period 5
بلاک	s-block
Element category	alkaline earth metal
معياري اټومي وزن (Ar)	کينډۍ:Val
Electron configuration	[Kr] 5s2
Electrons per shell	2, 8, 18, 8, 2
فزیکي خواص
حالت (at STP)	جامد
دويلې کيدو ټکى	1050 K ​(777 °C, ​1431 °F)
يشنا ټکی	1650 K ​(1377 °C, ​2511 °F)
Density near r.t.	2.64 g/cm3
when liquid, at m.p.	2.375 g/cm3
Heat of fusion	7.43 kJ/mol
Heat of vaporization	141 kJ/mol
Molar heat capacity	26.4 J/(mol·K)
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 796 882 990 1139 1345 1646
اټومي خواص
Oxidation states	2, 1 ​(a strongly basic oxide)
Electronegativity	Pauling scale: 0.95
Ionization energies	1st: 549.5 kJ/mol 2nd: 1064.2 kJ/mol 3rd: 4138 kJ/mol
Atomic radius	empirical: 215 pm
Covalent radius	195±10 pm
Van der Waals radius	249 pm
Miscellanea
Crystal structure	​face-centered cubic (fcc) Face-centered cubic crystal structure for strontium
Thermal expansion	22.5 µm/(m·K) (at 25 °C)
د تودوخې تېرېدنه	35.4 W/(m·K)
Electrical resistivity	132 nΩ·m (at 20 °C)
Magnetic ordering	paramagnetic
Magnetic susceptibility (χmol)	−92.0·10−6 cm3/mol (298 K)
Young's modulus	15.7 GPa
Shear modulus	6.03 GPa
Poisson ratio	0.28
Mohs hardness	1.5
CAS Number	7440-24-6
History
Naming	after the mineral strontianite, itself named after Strontian, Scotland
Discovery	William Cruickshank (1787)
First isolation	Humphry Davy (1808)
Main isotopes of strontium
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct 82Sr syn 25.36 d ε 82Rb 84Sr 0.56% stable 86Sr 9.86% stable 87Sr 7.00% stable 88Sr 82.58% stable 90Sr trace 28.90 y β− 90Y

Element navigation

PTstrontiumPT

Rb ←

iso 38Sr ibox    wd:Q938

→ Y

سرچينې

د سرچينو همدا لړليک په ليکنه کې نه ښکاري.

کينډۍ لاسوند[جوړول]