Właściwości

CAS Number7440-71-3
PubChem CIDna
Promień atomowy-
Objętość molowa18,4
Masa atomowa[251]
Blokf
Temperatura wrzenia-
Bulk Modulus
KategoriaAktynowce
Układ krystalograficznySześciokąt prosty
Kolor
Promień walencyjny-
Gęstość15,1
Rezystancja
Konfiguracja elektronowa[Rn] 5f10 7s2
Elektrony na poszczególnych powłokach2, 8, 18, 32, 28, 8, 2
Elektroujemność1,3
Elektrony98
Grupana
Ciepło topnieniana
Ciepło parowaniana
Energia jonizacji6,282
Magnetic Ordering
Magnetic Susceptibility
Masa[251]
Liczba masowa98
Temperatura topnienia900
NazwaKaliforn
Neutrony153
Liczba atomowa251
Stopnie utlenienia2, 3, 4
Okres7
Stan skupieniaCiało stałe
Poisson Ratio
Protony98
Shear Modulus
Ciepło właściwe-
SymbolCf
Przewodność cieplna0,1
Van der Waals radius
Moduł Younga
Obfitość
Ilość w skorupie Ziemina
Ilość we Wszechświeciena
Cf Kaliforn 98 (251) 7 f 98 [Rn] 5f10 7s2 2 8 18 32 28 8 2 None Unknown 1.3 {"1":"608"} 608 3 10.0 1 900.6 y 1.3×103y AlphaEmission Solid, Actinide, Radioactive, Synthetic kal-eh-FOR-ni-em Synthetic radioactive metal. Powerful neutron emitter. It has no significant commercial applications. Made by bombarding curium with helium ions. eG6HyPrTccI Californium
Thallium was discovered spectroscopically by Sir William Crookes in 1861, in London.

In 1862, Claude-Auguste Lamy used a spectrometer to determine the composition of a selenium-containing substance which was deposited during the production of sulfuric acid from pyrite.

He noticed the new green line in the spectra and concluded that a new element was present. From Greek thallos, meanin a green shoot or twig 98 1950 Glenn T. Seaborg, Stanley G. Thompson, Albert Ghiorso, Kenneth Street USA Named after the State and University of "California", USA

Isotopes of Thallium

Standard Atomic Weight

Stabilne izotopy

Niestabilne izotopy

237Cf 238Cf 239Cf 240Cf 241Cf 242Cf 243Cf 244Cf 245Cf 246Cf 247Cf 248Cf 249Cf 250Cf 251Cf 252Cf 253Cf 254Cf 255Cf 256Cf

Thallium and its compounds are highly toxic
Agatha Christie made use of thallium's toxicity in her novel The Pale Horse
Thallium selenide has been used in a bolometer for infrared detection.

Thallium is also used in gamma radiation detection equipment.

Thallium oxide has been used to produce glasses with a high index of refraction, and is used in the manufacture of photo cells.

Some of the electrodes in dissolved oxygen analyzers contain thallium.