Polonium,  84Po
Polonium.jpg
General properties
Pronunciation/[unsupported input]pɵˈlniəm/ po-LOH-nee-əm
Appearancesilvery
Polonium in the دوری جدول
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Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Nihonium (unknown chemical properties)
Flerovium (unknown chemical properties)
Moscovium (unknown chemical properties)
Livermorium (unknown chemical properties)
Tennessine (unknown chemical properties)
Oganesson (unknown chemical properties)
Te

Po

Lv
bismuthpoloniumastatine
جوہری عدد (Z)84
Group, periodgroup 16 (chalcogens), period 6
Blockp-block
Standard atomic weight (Ar)(209)
برقی تشکیل[Xe] 6s2 4f14 5d10 6p4
Electrons per shell
2, 8, 18, 32, 18, 6
Physical properties
Phasesolid
نقطۂ انجماد527 کیلون ​(254 °C, ​489 °F)
نقطہ کھولاؤ1235 K ​(962 °C, ​1764 °F)
کثافت near درجہ حرارت کمرہ(alpha) 9.196 g/cm3
(beta) 9.398 g/cm3
سخانۂ ائتلافca. 13 جول فی مول
Heat of 102.91 kJ/mol
Molar heat capacity26.4 J/(mol·K)
بخاری دباؤ
پ (پاسکل) 1 10 100 1 کے 10 کے 100 کے
 دح پر (کیلون)       (846) 1003 1236
Atomic properties
تکسیدی عددs6, 4, 2, −2
(amphoteric oxide)
برقی منفیتPauling scale: 2.0
جوہری رداسempirical: 168 پیکومیٹر
Covalent radius140±4 pm
وانڈروال رداس197 pm
Miscellanea
قلمی ساختcubic
Cubic crystal structure for polonium
حرارتی پھیلاؤ23.5 µm/(m·K) (at 25 °C)
حر ایصالیت? 20 W/(m·K)
مزاحمیت(α) 0.40 µ Ω·m (at 0 °C)
مقناطیسیتnonmagnetic
کیمیائی شعبۂ اخلاص اندراجی عدد7440-08-6
Main isotopes of polonium
ہم جا Abun­dance ہاف لائف (t1/2) اشعاعی تنزل Pro­duct
208Po syn 2.898 y α 5.215 204Pb
ε, β+ 1.401 208Bi
209Po syn 103 y α 4.979 205Pb
ε, β+ 1.893 209Bi
210Po trace 138.376 d α 5.307 206Pb
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