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https://or.wikipedia.org/wiki/Polonium

Polonium,  ₈₄Po

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	polonium, Po
Appearance	silvery
ଉଚ୍ଚାରଣ	/p[invalid input: 'ɵ']ˈloʊniəm/ po-LOH-nee-əm
Polonium in the periodic table
Te ↑ Po ↓ Lv bismuth ← polonium → astatine
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	84
ଶ୍ରେଣୀ, ବ୍ଳକ	group 16 (chalcogens), p-block
ପର୍ଯ୍ୟାୟ	period 6
ମୌଳିକ ପ୍ରକାର	post-transition metal, post-transition metal status is disputed (see article text)
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)	(209)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Xe] 6s2 4f14 5d10 6p4
per shell	2, 8, 18, 32, 18, 6
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	527 K ​(254 °C, ​489 °F)
ସ୍ଫୁଟନାଙ୍କ	1235 K ​(962 °C, ​1764 °F)
Density near r.t.	(alpha) 9.196 g/cm3 (beta) 9.398 g/cm3
Heat of fusion	ca. 13 kJ/mol
Heat of	102.91 kJ/mol
Molar heat capacity	26.4 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K)       (846) 1003 1236
Atomic properties
Oxidation states	6, 4, 2, −2 (amphoteric oxide)
Electronegativity	Pauling scale: 2.0
Atomic radius	empirical: 168 pm
Covalent radius	140±4 pm
Van der Waals radius	197 pm
Miscellanea
Crystal structure	​cubic
Thermal expansion	23.5 µm/(m·K) (at 25 °C)
Thermal conductivity	? 20 W/(m·K)
Electrical resistivity	(α) 0.40 µ Ω·m (at 0 °C)
Magnetic ordering	nonmagnetic
CAS Number	7440-08-6
ଇତିହାସ
ଆବିଷ୍କାର	Pierre Curie and Marie Curie (1898)
First isolation	Willy Marckwald (1902)
Most stable isotopes of polonium
iso NA half-life DM DE (MeV) DP 208Po syn 2.898 y α 5.215 204Pb β+ 1.401 208Bi 209Po syn 103 y α 4.979 205Pb β+ 1.893 209Bi 210Po trace 138.376 d α 5.307 206Pb
| references

ପୋଲୋନିଅମ ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Po ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୮୪ ।

• Bagnall, K. W. (1962). "The Chemistry of Polonium". Advances in Inorganic Chemistry and Radiochemistry. Vol. 4. New York: Academic Press. pp. 197–226. doi:10.1016/S0065-2792(08)60268-X. ISBN 0-12-023604-4. Retrieved June 14, 2012.

• Chemistry in its element podcast (MP3) from the Royal Society of Chemistry's Chemistry World: Polonium
• Polonium at The Periodic Table of Videos (University of Nottingham)