Thallium

Thallium, ₈₁Tl

Thallium
Pípè	/ˈθæliəm/ ​(THAL-ee-əm)
Ìhànsójú	silvery white
Ìwúwo átọ̀mù Ar, std(Tl)	[204.382, 204.385] conventional: 204.38
Thallium ní orí tábìlì àyè
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson In ↑ Tl ↓ Nh fàdákàolómi ← thallium → òjé
Nọ́mbà átọ̀mù (Z)	81
Ẹgbẹ́	group 13 (boron group)
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-p
Ẹ̀ka ẹ́límẹ́ntì	Post-transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f14 5d10 6s2 6p1
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 32, 18, 3
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	577 K ​(304 °C, ​579 °F)
Ígbà ìhó	1746 K ​(1473 °C, ​2683 °F)
Kíki (near r.t.)	11.85 g/cm3
when liquid (at m.p.)	11.22 g/cm3
Heat of fusion	4.14 kJ/mol
Heat of	165 kJ/mol
Molar heat capacity	26.32 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 882 977 1097 1252 1461 1758
Atomic properties
Oxidation states	−5, −2, −1, +1, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.62
Atomic radius	empirical: 170 pm
Covalent radius	170±8 pm
Van der Waals radius	196 pm
Spectral lines of thallium
Other properties
Natural occurrence	primordial
Crystal structure	​hexagonal
Speed of sound thin rod	818 m/s (at 20 °C)
Thermal expansion	29.9 µm/(m·K) (at 25 °C)
Thermal conductivity	46.1 W/(m·K)
Electrical resistivity	0.18 µ Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
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 Number	7440-28-0
Main isotopes of thallium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 203Tl 29.524% 203Tl is stable with 122 neutrons 204Tl syn 119 Ms (3.78 y) β− 0.764 204Pb ε 0.347 204Hg 205Tl 70.476% 205Tl is stable with 124 neutrons

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