Thallium

Thallium
	81Tl
	fàdákàolómi ← thallium → òjé
Ìhànsójú
	silvery white;
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà	thallium, Tl, 81
Ìpèlóhùn	/ˈθæliəm/, THAL-ee-əm
Ẹ̀ka ẹ́límẹ̀nti	post-transition metal
Ẹgbẹ́, àsìkò, àdìpò	13, 6, p
Ìwúwo átọ́mù	204.3833
Ìtòléra ẹ̀lẹ́ktrónì	[Xe] 4f14 5d10 6s2 6p1; 2, 8, 18, 32, 18, 3
Physical properties
Phase	solid
Density (near r.t.)	11.85 g·cm−3
Liquid density at m.p.	11.22 g·cm−3
Melting point	577 K, 304 °C, 579 °F
Boiling point	1746 K, 1473 °C, 2683 °F
Heat of fusion	4.14 kJ·mol−1
Heat of vaporization	165 kJ·mol−1
Molar heat capacity	26.32 J·mol−1·K−1
Vapor pressure
Atomic properties
Oxidation states	3, 1 (mildly basic oxide)
Electronegativity	1.62 (Pauling scale)
Ionization energies	1st: 589.4 kJ·mol−1
	2nd: 1971 kJ·mol−1
	3rd: 2878 kJ·mol−1
Atomic radius	170 pm
Covalent radius	170±8 pm
Van der Waals radius	196 pm
Miscellanea
Crystal structure	hexagonal
Magnetic ordering	diamagnetic
Electrical resistivity	(20 °C) 0.18 µΩ·m
Thermal conductivity	46.1 W·m−1·K−1
Thermal expansion	(25 °C) 29.9 µm·m−1·K−1
Speed of sound (thin rod)	(20 °C) 818 m·s−1
Young's modulus	8 GPa
Shear modulus	2.8 GPa
Bulk modulus	43 GPa
Poisson ratio	0.45
Mohs hardness	1.2
Brinell hardness	26.4 MPa
CAS registry number	7440-28-0
Àwọn ísótòpù dídúró jùlọ
	Main article: Àwọn ísótòpù thallium
	w; ọ; a; · r

Thallium ( /ˈθæliəm/ THAL-ee-əm) je apilese kemika pelu ami-idamo Tl ati nomba atomu 81.

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