Talium

81
Tl
Kumpulan
13
Kala
6
Blok
p
Proton
Elektron
Neutron
81
81
123
Ciri-Ciri Am
Nombor atom
81
Berat atom
204.3833
Nombor jisim
204
Kategori
Logam lemah
Warna
Perak
Radioaktif
Tidak
From Greek thallos, meanin a green shoot or twig
Struktur hablur
Hexagonal Ringkas
Sejarah
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.
Bilangan elektron per petala
2, 8, 18, 32, 18, 3
Konfigurasi elektron
[Xe] 4f14 5d10 6s2 6p1
Tl
Agatha Christie made use of thallium's toxicity in her novel The Pale Horse
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
11.85 g/cm3
Takat lebur
577.15 K | 304 °C | 579.2 °F
Takat didih
1746.15 K | 1473 °C | 2683.4 °F
Haba pelakuran
4.2 kJ/mol
Haba pengewapan
165 kJ/mol
Muatan haba molar
0.129 J/g·K
Banyak pada kerak bumi
0.000053%
Banyak pada alam semesta
5×10-8%
Pure
Kredit imej: Images-of-elements
Pure thallium under argon
Nombor CAS
7440-28-0
PubChem CID Number
5359464
Ciri-Ciri Atom
Jejari atom
170 pm
Jejari kovalen
145 pm
Keelektronegatifan
1.62 (Skala Pauling)
Kebolehan mengion
6.1082 eV
Isipadu atom
17.2 cm3/mol
Daya pengaliran terma
0.461 W/cm·K
Keadaan pengoksidaan
1, 3
Aplikasi
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
Isotop
Isotop stabil
203Tl, 205Tl
Isotop tidak stabil
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