Thallium Element in Periodic Table | Atomic Number Atomic Mass

Thallium

Thallium Element:

Thallium is an element in the 13th group and 6th period of periodic table. It is a grey post-transition metal. The atomic number of Thallium is 81 and it is indicated the symbol by Tl. It is a soft element and it is not found free in nature. It is a modestly abundant element in the Earth's crust. Its abundance is estimated to be about 0.7 mg/kg parts per million. Thallium contains 25 isotopes which have atomic masses that range from 184 to 210. 203Tl and 205Tl are the only stable isotopes and make up nearly all of natural thallium. Thallium and its compounds are very toxic. It’s also suspected as being carcinogenic.

Thallium Element Uses:

  • The use of thallium is limited as it is a toxic element. Thallium sulphate has been used as a rat poison and ant killer.
  • It is most often used in photoelectric cells, infrared optical equipment, low melting glasses and several other applications.

Thallium

Thallium Element Information:

Discovery year:1861

Discovered by:William Crookes

Atomic number: 81

Relative atomic mass: 204.38  

Electron configuration: [Xe] 4f14 5d10 6s2 6p1

Block: p-block

Other elements in the same block:

Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Gallium, Germanium, Arsenic, Selenium, Bromine, Krypton, Indium, Tin, Antimony, Tellurium, Iodine, Xenon, Lead, Bismuth, Polonium, Astatine, Radon, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine and Oganesson are the same block elements.

Period: period 6 

Other elements in the same period:

Caesium, Barium, LanthanumCerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Lead, Bismuth, Polonium, Astatine and Radon

Group: group 13 (boron group)

Other elements in the same group:

Boron, Aluminium, Gallium, Indium and Nihonium are the same group elements.

Other elements in the same orbital:

Lead, Bismuth, Polonium, Astatine and Radon are the elements in the same orbital.

Allotropes: none

Key isotopes: 205Tl 

Melting point: 304°C, 579°F, 577 K 

Boiling point: 1473°C, 2683°F, 1746 K

Element category: post-transition metal 

Density (g cm−3): 11.8

CAS number: 7440-28-0

Color: silvery white

You can know detailed information for each element,

Hydrogen, HeliumLithiumBerylliumBoronCarbonNitrogenOxygenFluorine,  Neon , SodiumMagnesiumAluminiumSiliconPhosphorusSulfurChlorineArgon, PotassiumCalciumScandiumTitaniumVanadiumChromiumManganeseIronCobaltNickelCopperZincGalliumGermaniumArsenicSeleniumBromine, Krypton,  Rubidium, StrontiumYttriumZirconiumNiobiumMolybdenumTechnetiumRutheniumRhodiumPalladiumSilverCadmiumIndiumTinAntimonyTelluriumIodine, Xenon,  Caesium, BariumLanthanum,  CeriumPraseodymiumNeodymiumPromethiumSamariumEuropiumGadoliniumTerbiumDysprosiumHolmiumErbiumThuliumYtterbiumLutetiumHafniumTantalumTungstenRheniumOsmiumIridiumPlatinumGoldMercuryThalliumLeadBismuthPoloniumAstatine, Radon,  Francium, RadiumActiniumThoriumProtactiniumUraniumNeptuniumPlutoniumAmericiumCuriumBerkeliumCaliforniumEinsteiniumFermiumMendeleviumNobeliumLawrenciumRutherfordiumDubniumSeaborgiumBohriumHassiumMeitneriumDarmstadtiumRoentgeniumCoperniciumNihoniumFleroviumMoscoviumLivermoriumTennessine, Oganesson.

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