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<p></p> <p><b>New page</b></p><div>{{infobox element<br /> |number=84<br /> |symbol=Po<br /> |name=polonium<br /> |allotropes = &amp;alpha;, &amp;beta;<br /> |abundance=<br /> |abundance in earth's crust=<br /> |abundance in oceans=<br /> |abundance in solar system=<br /> |left=[[bismuth]]<br /> |right=[[astatine]]<br /> |above=[[tellurium|Te]]<br /> |below=[[Livermorium|Lv]]<br /> |category comment=<br /> |group=16<br /> |period=6<br /> |block=p<br /> |appearance=silvery<br /> |image name={{main other|Polonium.jpg|NonFreeImageRemoved.svg}}<br /> |electrons per shell=2, 8, 18, 32, 18, 6<br /> |phase=<br /> |density gpcm3nrt=alpha: 9.196<br /> |density gpcm3nrt 2=beta: 9.398<br /> |melting point K=527<br /> |melting point C=254<br /> |melting point F=489<br /> |boiling point K=1235<br /> |boiling point C=962<br /> |boiling point F=1764<br /> |heat fusion=ca. 13<br /> |heat vaporization=102.91<br /> |heat capacity=26.4<br /> |vapor pressure 1=<br /> |vapor pressure 10=<br /> |vapor pressure 100=<br /> |vapor pressure 1 k= (846)<br /> |vapor pressure 10 k=1003<br /> |vapor pressure 100 k=1236<br /> |vapor pressure comment=<br /> |crystal structure=cubic<br /> |crystal structure comment=&amp;alpha;-Po<br /> |crystal structure 2=rhombohedral<br /> |crystal structure 2 comment=&amp;beta;-Po<br /> |electronegativity=2.0<br /> |number of ionization energies=1<br /> |ionization energy 1=812.1<br /> |atomic radius=168<br /> |covalent radius=140±4<br /> |Van der Waals radius=197<br /> |magnetic ordering=nonmagnetic<br /> |electrical resistivity unit prefix=µ<br /> |electrical resistivity at 0=α: 0.40<br /> |thermal conductivity=20<br /> |thermal conductivity comment=(?)<br /> |thermal expansion at 25=23.5<br /> |CAS number=7440-08-6<br /> |magnetic susceptibility=<br /> |magnetic susceptibility ref=<br /> |isotopes=<br /> {{infobox element/isotopes decay2 | mn=208 | sym=Po<br /> |na=[[synthetic radioisotope|syn]] | hl=2.898&amp;nbsp;y<br /> |dm1=[[alpha emission|α]] | de1=5.215 | link1=lead-204 | pn1=204 | ps1=Pb<br /> |dm2=[[positron decay|β&lt;sup&gt;+&lt;/sup&gt;]] | de2=1.401 | link2=bismuth-208 | pn2=208 | ps2=Bi}}<br /> {{infobox element/isotopes decay2 | mn=209 | sym=Po<br /> |na=syn | hl=125.2&amp;nbsp;y&lt;ref name=Po209&gt;{{cite web|last1=Boutin|first1=Chad|title=Polonium's Most Stable Isotope Gets Revised Half-Life Measurement|url=http://www.nist.gov/pml/div682/po-090914.cfm|website=nist.gov|publisher=NIST Tech Beat|access-date=9 September 2014}}&lt;/ref&gt;<br /> |dm1=α | de1=4.979 | link1=lead-205 | pn1=205 | ps1=Pb<br /> |dm2=β&lt;sup&gt;+&lt;/sup&gt; | de2=1.893 | link2=bismuth-209 | pn2=209 | ps2=Bi}}<br /> {{infobox element/isotopes decay | mn=210 | sym=Po |link=Polonium-210<br /> |na=[[trace radioisotope|trace]] | hl=138.376&amp;nbsp;d<br /> |dm=α | de=5.307 | link1=lead-206 | pn=206 | ps=Pb}}<br /> |isotopes comment=<br /> |naming=after {{lang|la|Polonia}}, Latin for [[Poland]], homeland of Marie Curie<br /> |discovered by=[[Pierre Curie|Pierre]] and [[Marie Curie]]<br /> |discovery date=1898<br /> |first isolation by=[[Willy Marckwald]]<br /> |first isolation date=1902<br /> |QID=Q979<br /> }}&lt;!--<br /> <br /> --&gt;&lt;noinclude&gt;<br /> {{Infobox element/element navigation|symbol=Po}}<br /> {{Template reference list}}<br /> {{documentation|1=Template:Infobox element/doc}}<br /> &lt;/noinclude&gt;</div>

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