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{{Elementbox
{{Kotak info praseodimium}}▼
|number=59
|symbol=Pr
|pronounce={{IPAc-en|ˌ|p|r|eɪ|z|i|.|ɵ|ˈ|d|ɪ|m|i|əm}} {{respell|PRAY|zee-o|DIM|ee-əm}} <br> or {{IPAc-en|ˌ|p|r|eɪ|s|i|.|ɵ|ˈ|d|ɪ|m|i|əm}} {{respell|PRAY|see-o|DIM|ee-əm}}
|left=[[cerium]]
|right=[[neodimium]]
|above=-
|below=[[protaktinium|Pa]]
|series= lantanida
|period=6
|block=f
|image name= Praseodymium.jpg
|appearance=putih keabuan
|atomic mass= 140.90765
|electron configuration= [[[xenon|Xe]]] 4f<sup>3</sup> 6s<sup>2</sup>
|electrons per shell= 2, 8, 18, 21, 8, 2
|phase= solid
|density gpcm3nrt= 6.77
|density gpcm3mp= 6.50
|melting point K=1208
|melting point C=935
|melting point F=1715
|boiling point K=3793
|boiling point C=3520
|boiling point F=6368
|heat fusion= 6.89
|heat vaporization= 331
|heat capacity= 27.20
|vapor pressure 1= 1771
|vapor pressure 10= 1973
|vapor pressure 100= (2227)
|vapor pressure 1 k= (2571)
|vapor pressure 10 k= (3054)
|vapor pressure 100 k= (3779)
|vapor pressure comment=
|crystal structure= heksagonal
|oxidation states= 4, '''3''', 2 (oksida [[basa]] agak kuat)
|electronegativity= 1.13
|number of ionization energies=3
|1st ionization energy= 527
|2nd ionization energy= 1020
|3rd ionization energy= 2086
|atomic radius= 182
|covalent radius= 203±7
|magnetic ordering= [[paramagnetik]]<ref name=jackson>M. Jackson "Magnetism of Rare Earth" [http://www.irm.umn.edu/quarterly/irmq10-3.pdf The IRM quarterly col. 10, No. 3, p. 1, 2000]</ref>
|electrical resistivity= ([[suhu ruangan|r.t.]]) (α, poly)<br />0.700 µ
|thermal conductivity= 12.5
|thermal expansion= ([[suhu ruangan|r.t.]]) (α, poly) 6.7
|speed of sound rod at 20= 2280
|Young's modulus= (α form) 37.3
|Shear modulus= (α form) 14.8
|Bulk modulus= (α form) 28.8
|Poisson ratio= (α form) 0.281
|Vickers hardness= 400
|Brinell hardness= 481
|CAS number= 7440-10-0
|isotopes=
{{Elementbox_isotopes_stable | mn=141 | sym=Pr | na=100% | n=82}}
{{Elementbox_isotopes_decay2 | mn=142 | sym=Pr
| na=[[radioisotop sintetik|syn]] | hl=19.12 h
| dm1=[[peluruhan beta|β<sup>−</sup>]] | de1=2.162 | pn1=142 | ps1=[[neodimium|Nd]]
| dm2=[[electron capture|ε]] | de2=0.745 | pn2=142 | ps2=[[serium|Ce]]}}
{{Elementbox_isotopes_decay | mn=143 | sym=Pr
| na=[[radioisotop sintetik|syn]] | hl=13.57 [[day|d]]
| dm=[[emisi beta|β<sup>−</sup>]] | de=0.934 | pn=143 | ps=[[neodimium|Nd]]}}
|isotopes comment=
}}
{{unsur|Praseodimium|Pr|59}}
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