View source for Template:Infobox thorium

{{Infobox element
|engvar ={{{engvar|}}}
|symbol =Th
|Z      =90
|number =90
|name   =thorium
|abundance=
|abundance in earth's crust=
|abundance in oceans=
|abundance in solar system=
|left=[[actinium]]
|right=[[protactinium]]
|above=[[cerium|Ce]]
|below=—
|appearance=silvery
|image name=Thorium sample 0.1g.jpg
|electrons per shell=2, 8, 18, 32, 18, 10, 2
|phase=
|density=11.725&nbsp;g/cm<sup>3</sup><ref name="Arblaster 2018" />
|density conditions=(at&nbsp;20°&nbsp;C)
|melting point K=2023
|melting point C=1750
|melting point F=3182
|boiling point K=5061
|boiling point C=4788
|boiling point F=8650
|heat fusion=13.81
|heat vaporization=514
|heat capacity=26.230
|vapor pressure 1=2633
|vapor pressure 10=2907
|vapor pressure 100=3248
|vapor pressure 1 k=3683
|vapor pressure 10 k=4259
|vapor pressure 100 k=5055
|vapor pressure comment=
|crystal structure=facecentredcubic
|crystal structure Pearson symbol=cF4
|lattice constant=''a''&nbsp;=&nbsp;508.45&nbsp;pm (at&nbsp;20&nbsp;°C)<ref name="Arblaster 2018">{{cite book |last=Arblaster |first= John W. |title=Selected Values of the Crystallographic Properties of Elements |publisher=ASM International |publication-place=Materials Park, Ohio |date=2018 |isbn=978-1-62708-155-9}}</ref>
|electronegativity=1.3
|number of ionization energies=3
|ionization energy 1=587
|ionization energy 2=1110
|ionization energy 3=1930
|atomic radius=179.8
|covalent radius=206±6
|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-last = Lide |editor-first=D. R. | title = CRC Handbook of Chemistry and Physics | edition = 86th |  publisher = CRC Press | year = 2005 | isbn = 978-0-8493-0486-6 | pages = 4-135 }}</ref>
|electrical resistivity unit prefix=n
|electrical resistivity at 0=157
|thermal conductivity=54.0
|thermal expansion=<!-- see thermal expansion comment -->
|thermal expansion comment={{val|11.54|e=−6}}/K (at&nbsp;20&nbsp;°C)<ref name="Arblaster 2018" />
|thermal expansion at 25=
|speed of sound rod at 20=2490
|magnetic susceptibility= {{val|132.0|e=−6}}
|magnetic susceptibility ref=&#x20;(293&nbsp;K)<ref>{{Cite book|title=CRC, Handbook of Chemistry and Physics|last=Weast|first=R.|publisher=Chemical Rubber Company Publishing|year=1984|isbn=978-0-8493-0464-4|page=E110}}</ref>
|Young's modulus=79
|Shear modulus=31
|Bulk modulus=54
|Poisson ratio=0.27
|Mohs hardness=3.0
|Vickers hardness=295–685
|Brinell hardness=390–1500
|CAS number=7440-29-1
|naming=after [[Thor]], the Norse god of thunder
|discovered by=[[Jöns Jakob Berzelius]]
|discovery date=1829
|QID=Q1115
}}<!--

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