ପୋଲୋନିଅମ

ଉଇକିପିଡ଼ିଆ ରୁ
ସିଧାସଳଖ ଯିବେ ଦିଗବାରେଣିକୁ, ଖୋଜିବେ
Polonium,  84Po
Polonium.jpg
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ polonium, Po
Appearance silvery
ଉଚ୍ଚାରଣ /pɵˈlniəm/ po-loh-nee-əm
Polonium in the periodic table
Hydrogen (other non-metal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (other non-metal)
Nitrogen (other non-metal)
Oxygen (other non-metal)
Fluorine (halogen)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silicon (metalloid)
Phosphorus (other non-metal)
Sulfur (other non-metal)
Chlorine (halogen)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (post-transition metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (other non-metal)
Bromine (halogen)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (post-transition metal)
Tin (post-transition metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (halogen)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanoid)
Cerium (lanthanoid)
Praseodymium (lanthanoid)
Neodymium (lanthanoid)
Promethium (lanthanoid)
Samarium (lanthanoid)
Europium (lanthanoid)
Gadolinium (lanthanoid)
Terbium (lanthanoid)
Dysprosium (lanthanoid)
Holmium (lanthanoid)
Erbium (lanthanoid)
Thulium (lanthanoid)
Ytterbium (lanthanoid)
Lutetium (lanthanoid)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (post-transition metal)
Lead (post-transition metal)
Bismuth (post-transition metal)
Polonium (post-transition metal)
Astatine (halogen)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinoid)
Thorium (actinoid)
Protactinium (actinoid)
Uranium (actinoid)
Neptunium (actinoid)
Plutonium (actinoid)
Americium (actinoid)
Curium (actinoid)
Berkelium (actinoid)
Californium (actinoid)
Einsteinium (actinoid)
Fermium (actinoid)
Mendelevium (actinoid)
Nobelium (actinoid)
Lawrencium (actinoid)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
Te

Po

Lv
bismuthpoloniumastatine
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
Cubic crystal structure for polonium
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 Poପରମାଣୁ କ୍ରମାଙ୍କ ୮୪ ଅଟେ ।

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