Özellikler

CAS Number7440-71-3
PubChem CIDna
Atom yarıçapı-
Atomik Hacim18,4
Atom ağırlığı[251]
Blokf
Kaynama noktası-
Bulk Modulus
KategoriAktinit
Kristal yapısıBasit altıgen
Renk
Kovalent yarıçapı-
Yoğunluk15,1
Electrical Resistivity
Elektron dizilimi[Rn] 5f10 7s2
Enerji seviyesi başına Elektronlar2, 8, 18, 32, 28, 8, 2
Elektronegatifliği1,3
Electrons98
Grupna
Ergime ısısına
Buharlaşma ısısına
İyonlaşma enerjisi6,282
Magnetic Ordering
Magnetic Susceptibility
Kütle[251]
Mass Number98
Ergime noktası900
İsimKaliforniyum
Nötronlar153
Atom numarası251
Yükseltgenme seviyeleri2, 3, 4
Periyot7
FazKatı
Poisson Ratio
Protonlar98
Shear Modulus
Isı kapasitesi-
SembolCf
Isıl iletkenlik0,1
Van der Waals radius
Young's Modulus
Bulunabilirlik
Dünya kabuğundaki bulunulabilirliğina
Evrendeki bulunulabilirliğina
Cf Kaliforniyum 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

Talyum izotopları

Standard Atomic Weight

Kararlı izotoplar

Kararsız izotoplar

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.