Facts about the
Definition of the Element Thallium
The Element Thallium is defined as...
A soft, malleable, highly toxic metallic element, used in
photocells, infrared detectors, low-melting glass, and formerly in
rodent and ant poisons.
Interesting Facts
about the Origin and Meaning of the element name Thallium
What are the origins of the word Thallium ?
The name originates from the Greek word 'thallos' meaning a green
shoot or twig from Thallium's bright green spectral emission
lines.
Facts about the
Classification of the Element Thallium
Thallium is classified in the 'Other Metals' section which can be
located in groups 13, 14, and 15 of the Periodic Table. All of
these elements are solid, have a relatively high density and are
opaque.
Brief Facts about the
Discovery and History of the Element Thallium Thallium was discovered by Sir
William Crookes in England in 1861. Claude-Auguste Lamy and Sir
William Crookes isolated the metal independent of each other in
1862.
Occurrence of the
element Thallium in
the Atmosphere
Obtained from crookesite, hutchinsonite & lorandite
Common Uses of
Thallium
Photocells
Rat poison
Ant killer
Thallium bromide-iodide crystals have been used as infrared
optical materials
Gamma radiation detection equipment
Medical applications for the treatment of skin infections
The Properties of the Element Thallium
Name of Element : Thallium
Symbol of Element : Tl
Atomic Number of Thallium : 81
Atomic Mass: 204.3833 amu
Melting Point: 303.5 °C - 576.65 °K
Boiling Point: 1457.0 °C - 1730.15 °K
Number of Protons/Electrons in Thallium : 81
Number of Neutrons in Thallium : 123
Crystal Structure: Hexagonal
Density @ 293 K: 11.85 g/cm3
Color of Thallium : bluish-gray
The element Thallium and the Periodic Table
Find out more facts about Thallium on the Periodic Table which
arranges every chemical element according to its atomic number, as
based on the periodic law, so that chemical elements with similar
properties are in the same column. Our Periodic Table is simple to
use - just click on the symbol for Thallium for additional facts and
info and for an instant comparison of the Atomic Weight, Melting
Point, Boiling Point and Mass - G/cc of Thallium with any other
element. An invaluable source for more interesting facts and
information about the Thallium element and as a Chemistry reference
guide.
Facts and Info about
the element Argon - IUPAC and the Modern Standardised Periodic Table
The Standardised Periodic Table in use today was agreed by the
International Union of Pure Applied Chemistry, IUPAC, in 1985
which includes the Thallium element. The famous Russian Scientist,
Dimitri Mendeleev, perceived the correct classification method of
"the periodic table" for the 65 elements which were known in his
time. Thallium was discovered by Sir William Crookes in England in
1861. Claude-Auguste Lamy and Sir William Crookes isolated the
metal independent of each other in 1862. The Standardised Periodic Table now recognises more periods
and elements than Dimitri Mendeleev knew in his day but still all
fitting into his concept of the "Periodic Table" in which
Thallium is
just one element that can be found.
