Svojstva

CAS broj7440-71-3
PubChem CIDna
Atomski radijus-
Atomski volumen18,4
Relativna atomska masa[251]
Blokf
Vrelište-
Modul stišljivosti
KategorijaAktinoidi
Kristalna strukturaJednostavna heksagonska
Boja
Kovalentni radijus-
Gustoća15,1
Električna otpornost
Elektronska konfiguracija[Rn] 5f10 7s2
Elektrona po ljusci2, 8, 18, 32, 28, 8, 2
Elektronegativnost1,3
Elektroni98
Skupinana
Toplina taljenjana
Toplina isparavanjana
Potencijal ionizacije6,282
Magnetsko redanje
Magnetska osjetljivost
Masa[251]
Maseni broj98
Talište900
NazivKalifornij
Neutroni153
Atomski broj251
Stanja oksidacije2, 3, 4
Perioda7
Agregacijsko stanjeČvrsto
Poissonov omjer
Protoni98
Modul smicanja
Specifični toplinski kapacitet-
SimbolCf
Toplinska vodljivost0,1
Van der Waalsov radijus
Youngov modul
Obilnost
Zastupljenost u Zemljinoj korina
Zastupljenost u svemiruna
Cf Kalifornij 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. Od grčke riječi thallos, zelena grančica 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

Stabilni izotopi

Nestabilni izotopi

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.