Samarium

Samarium, ₆₂Sm
Samarium
Pípè	/səˈmɛəriəm/ (sə-MAIR-ee-əm)
Ìhànsójú	silvery white
Ìwúwo átọ̀mù Ar, std(Sm)	150.36(2)
Samarium ní orí tábìlì àyè
	promethium ← samarium → europium
Nọ́mbà átọ̀mù (Z)	62
Ẹgbẹ́	group n/a
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì	Lanthanide
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f6 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 24, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1345 K (1072 °C, 1962 °F)
Ígbà ìhó	2067 K (1794 °C, 3261 °F)
Kíki (near r.t.)	7.52 g/cm3
when liquid (at m.p.)	7.16 g/cm3
Heat of fusion	8.62 kJ/mol
Heat of	165 kJ/mol
Molar heat capacity	29.54 J/(mol·K)
Atomic properties
Oxidation states	0, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.17
Atomic radius	empirical: 180 pm
Covalent radius	198±8 pm
	Color lines in a spectral rangeSpectral lines of samarium
Other properties
Natural occurrence	primordial
Crystal structure	rhombohedral
Speed of sound thin rod	2130 m/s (at 20 °C)
Thermal expansion	(r.t.) (α, poly) 12.7 µm/(m·K)
Thermal conductivity	13.3 W/(m·K)
Electrical resistivity	(r.t.) (α, poly) 0.940 µ Ω·m
Magnetic ordering	paramagnetic
Young's modulus	(α form) 49.7 GPa
Shear modulus	(α form) 19.5 GPa
Bulk modulus	(α form) 37.8 GPa
Poisson ratio	(α form) 0.274
Vickers hardness	412 MPa
Brinell hardness	441 MPa
CAS Number	7440-19-9
Main isotopes of samarium
	Àdàkọ:Category-inline; wo; ọ̀rọ̀; àtúnṣe; \| references

Samarium (pípè /səˈmɛəriəm/, sə-MAIR-ee-əm) je apilese kemika to ni ami-idamo Sm ati nomba atomu 62.

Àyọkà yìí tàbí apá rẹ̀ únfẹ́ àtúnṣe sí.

Ẹ le fẹ̀ jù báyìí lọ tàbí kí ẹ ṣàtúnṣe rẹ̀ lọ́nà tí yíò mu kúnrẹ́rẹ́. Ẹ ran Wikipedia lọ́wọ́ láti fẹ̀ẹ́ jù báyìí lọ.

Itokasi àtúnṣe

↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305.
↑ Yttrium and all lanthanides except Ce, Pm, Eu, Tm, Yb have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017.
↑ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.