Talij

81
Tl
Skupina
13
Perioda
6
Blok
p
Protons
Electrons
Neutrons
81
81
123
General Properties
Vrstno število
81
Atomska teža
204,3833
Mass Number
204
Kategorija
Šibke kovine
Barva
Silver
Radioactive
Ne
From Greek thallos, meanin a green shoot or twig
Kristalna struktura
Heksagonalna
Zgodovina
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.
Electrons per shell
2, 8, 18, 32, 18, 3
Razporeditev elektronov
[Xe] 4f14 5d10 6s2 6p1
Tl
Agatha Christie made use of thallium's toxicity in her novel The Pale Horse
Physical Properties
Faza snovi
Trdnina
Gostota
11,85 g/cm3
Tališče
577,15 K | 304 °C | 579,2 °F
Vrelišče
1746,15 K | 1473 °C | 2683,4 °F
Talilna toplota
4,2 kJ/mol
Izparilna toplota
165 kJ/mol
Toplotna kapaciteta
0,129 J/g·K
Abundance in Earth's crust
0,000053%
Abundance in Universe
5×10-8%
Pure
Zasluge za slike: Images-of-elements
Pure thallium under argon
CAS Number
7440-28-0
PubChem CID Number
5359464
Atomic Properties
Atomski polmer
170 pm
Kovalentni polmer
145 pm
Elektronegativnost
1,62 (Paulingova lestvica)
Ionization Potential
6,1082 eV
Atomic Volume
17,2 cm3/mol
Toplotna prevodnost
0,461 W/cm·K
Oksidacijska stanja
1, 3
Applications
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.
Thallium and its compounds are highly toxic
Isotopes
Stable Isotopes
203Tl, 205Tl
Unstable Isotopes
176Tl, 177Tl, 178Tl, 179Tl, 180Tl, 181Tl, 182Tl, 183Tl, 184Tl, 185Tl, 186Tl, 187Tl, 188Tl, 189Tl, 190Tl, 191Tl, 192Tl, 193Tl, 194Tl, 195Tl, 196Tl, 197Tl, 198Tl, 199Tl, 200Tl, 201Tl, 202Tl, 204Tl, 206Tl, 207Tl, 208Tl, 209Tl, 210Tl, 211Tl, 212Tl