Th meaning in Chemistry ?

Answer:

What is Thorium mean?

Thorium is a weakly radioactive metallic chemical element with the symbol Th and atomic number 90. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft, malleable, and has a high melting point. Thorium is an electropositive actinide whose chemistry is dominated by the +4 oxidation state; it is quite reactive and can ignite in air when finely divided.

All known thorium isotopes are unstable. The most stable isotope, 232Th, has a half-life of 14.05 billion years, or about the age of the universe; it decays very slowly via alpha decay, starting a decay chain named the thorium series that ends at stable 208Pb. On Earth, thorium and uranium are the only significantly radioactive elements that still occur naturally in large quantities as primordial elements. Thorium is estimated to be over three times as abundant as uranium in the Earth's crust, and is chiefly refined from monazite sands as a by-product of extracting rare-earth metals.

Thorium was discovered in 1828 by the Norwegian amateur mineralogist Morten Thrane Esmark and identified by the Swedish chemist Jöns Jacob Berzelius, who named it after Thor, the Norse god of thunder. Its first applications were developed in the late 19th century. Thorium's radioactivity was widely acknowledged during the first decades of the 20th century. In the second half of the century, thorium was replaced in many uses due to concerns about its radioactivity.

Thorium is still being used as an alloying element in TIG welding electrodes but is slowly being replaced in the field with different compositions. It was also material in high-end optics and scientific instrumentation, used in some broadcast vacuum tubes, and as the light source in gas mantles, but these uses have become marginal. It has been suggested as a replacement for uranium as nuclear fuel in nuclear reactors, and several thorium reactors have been built. Thorium is also used in strengthening magnesium, coating tungsten wire in electrical equipment, controlling the grain size of tungsten in electric lamps, high-temperature crucibles, and glasses including camera and scientific instrument lenses. Other uses for thorium include heat-resistant ceramics, aircraft engines, and in light bulbs. Ocean science has utilized (231)Pa/(230)Th isotope ratios to understand the ancient ocean.

reference

Full Form	Category
Tug Hoist	Academic & Science
Technische Handleiding	Business
Tax Home	Business
Theratechnologies, Inc.	Business
Tiny House	Business
Thorium	Chemistry
Tomlinson Holman, film technologist	Community
Travel and Hospitality	Community
Trinity House	Community
Trinity Hymnal	Community
Table Heads	Community
Tom Hanks	Community
Tim Horton	Community
Today's Headline	Community
Tokio Hotel	Community
Tomlinson-Harashima	Computer and Networking
Table Header	Computer Assembly Language
Think Hardware	Computing
Thailand	Country Names
Team Heretics Fan Token	Cryptocurrency
Table Heading	Database Management
Time History	Database Management
Through Hole	Electronics
Thursday	General
Trefil And Hazen	General
Target Hunter	General
Texas Holdem	General
Tennessee Honey	General
Taylor Hanson	General
Turbo Hydromatic	General
Tech Haven	General
Thermal Hopper	General
Temperance House	General
The Hated	General
Transmission Header	General
Teddy Hoosevelt	General
Timestream Horrorsphere	General
Turbo Hydramatic	General
Thomas Hedison	General
Tyrolean Haflingers	General
Tuesday And Huwebes	General
The Hulk	General
Top Hat	General
Thomas Helmut	General
Tilman Henry	General
Texas Hold	General
Terroir Hunter	General
Turner Hooch	General
The Husband	General
Torii Hunter	General
T helper	General
Tow Howth	General
Tchaikovsky Handbook	General
Thornton's American Glossary	General
Trans Human	General
Tabung Haji	General
TH Has	General
Town Hall	General
Threshold	Governmental
Territory of Hawaii	Governmental
Town Highway	Governmental
Thiokol	Governmental
Theim	Governmental
Tax House	Governmental
TINICH	Indian Railway Station
Templum Hierosolymae	International
Technische Hochschule	International
Truth Hurts	Internet
Trying hard	Internet
Theoretical Hypothesis	Maths
Truly Hierarchical	Maths
Thoracic	Medical
Thyroid Hormone	Medical
Tyrosine Hydroxylase	Medical
Try Hard	Messaging
Transmittal Header	Military and Defence
Training Helicopter	Military and Defence
Targeting High	Military and Defence
Thai	Regional
Tournament Hours	Sports
Team Handsome	Sports