Editing Template:Infobox protactinium

{{Infobox element
|number=91
|symbol=Pa
|name=protactinium
|abundance=
|abundance in earth's crust=
|abundance in oceans=
|abundance in solar system=
|left=[[thorium]]
|right=[[uranium]]
|above=[[praseodymium|Pr]]
|below=(Uqp)
|category=actinide
|period=7
|block=f
|group=n/a
|appearance=bright, silvery metallic luster
|image name={{main other|Protactinium.jpg|NonFreeImageRemoved.svg}}
|electron configuration=&#91;[[radon|Rn]]&#93; 5f<sup>2</sup> 6d<sup>1</sup> 7s<sup>2</sup>
|electrons per shell=2, 8, 18, 32, 20, 9, 2
|phase=solid
|density gpcm3nrt=15.37
|melting point K=1841
|melting point C=1568
|melting point F=2854
|boiling point K=4300
|boiling point C=4027
|boiling point F=7280
|boiling point comment=(?)
|heat fusion=12.34
|heat vaporization=481
|crystal structure=tetragonal
|crystal structure ref=<ref name=str>{{cite journal|last1=Donohue|first1=J.|title=On the crystal structure of protactinium metal|journal=[[Acta Crystallographica]]|volume=12|pages=697|year=1959|doi=10.1107/S0365110X59002031|issue=9}}</ref>
|oxidation states=2, 3, 4, '''5'''
|oxidation states comment=(a weakly [[base (chemistry)|basic]] oxide)
|electronegativity=1.5
|number of ionization energies=1
|ionization energy 1=568
|atomic radius=163
|covalent radius=200
|magnetic ordering=[[paramagnetic]]
|magnetic ordering ref=<ref name=magnet>{{cite book |url=https://web.archive.org/web/20110303222309/http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf|chapter=Magnetic susceptibility of the elements and inorganic compounds| editor = Lide, D. R. | title = CRC Handbook of Chemistry and Physics | edition = 86th | location = Boca Raton (FL) | publisher = CRC Press | year = 2005 | isbn = 0-8493-0486-5 }}</ref>
|electrical resistivity unit prefix=n
|electrical resistivity at 0=177
|thermal conductivity=47
|thermal expansion=~9.9
|thermal expansion ref=<ref>{{cite book|chapter=Chapter 2. Thermal Expansion|url=http://www.owlnet.rice.edu/~msci301/ThermalExpansion.pdf|page=11|publisher=ASM International|title=ASM Ready Reference: Thermal Properties of Metals |editor=Cverna, Fran |year=2002|isbn=0871707683}}</ref>
|thermal expansion comment=(at&nbsp;{{abbr|r.t.|room temperature}})
|CAS number=7440-13-3
|magnetic susceptibility=
|magnetic susceptibility ref=
|isotopes=
{{infobox element/isotopes decay | mn=229 | sym=Pa
|na=[[synthetic radioisotope|syn]] | hl=1.5&nbsp;d
|dm=[[electron capture|ε]] | de=0.311 | link1=thorium-229 | pn=229 | ps=Th}}
{{infobox element/isotopes decay | mn=230 | sym=Pa
|na=syn | hl=17.4&nbsp;d
|dm=ε | de=1.310 | | link1=thorium-230 | pn=230 | ps=Th}}
{{infobox element/isotopes decay | mn=231 | sym=Pa
|na=100% | hl=3.276×10<sup>4</sup>&nbsp;y
|dm=[[alpha decay|α]] | de=5.150 | link1=actinium-227 | pn=227 | ps=Ac}}
{{infobox element/isotopes decay | mn=232 | sym=Pa
|na=syn | hl=1.31&nbsp;d
|dm=[[beta emission|β<sup>−</sup>]] | de=1.337 | link1=uranium-232 | pn=232 | ps=U}}
{{infobox element/isotopes decay | mn=233 | sym=Pa
|na=[[trace radioisotope|trace]] | hl=26.967&nbsp;d
|dm=β<sup>−</sup> | de=0.5701 | link1=uranium-233 | pn=233 | ps=U}}
{{infobox element/isotopes decay | mn=234 | sym=Pa
|na=trace | hl=6.75&nbsp;h
|dm=β<sup>−</sup> | de=2.195 | pn=234 | ps=U}}
{{infobox element/isotopes decay | mn=234[[Meta state|m]] | sym=Pa
|na=trace | hl=1.17&nbsp;min
|dm=β<sup>−</sup> | de=2.29 | link1=uranium-234 | pn=234 | ps=U}}
|isotopes comment=
|predicted by=[[Dmitri Mendeleev]]
|prediction date=1869
|discovery and first isolation by=[[Kasimir Fajans]] and [[Oswald Helmuth Göhring]]
|discovery date=1913
|named by=[[Otto Hahn]] and [[Lise Meitner]]
|named date=1917–8
|QID=Q1109
}}<!--

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{{Infobox element/element navigation|symbol=Pa}}
{{Template reference list}}
{{documentation|1=Template:Infobox element/doc}}
</noinclude>