 |
|
|
Thorium - History | A Wisdom Archive on Thorium - History | | Thorium - History A selection of articles related to Thorium - History | |
|
|
More material related to Thorium can be found here:
|
|
|
| | |
Thorium, Thorium - Applications, Thorium - History, Thorium - Isotopes, Thorium - Notable characteristics, Thorium - Occurrence, Thorium - Precautions, Thorium - Reference, Thorium - Thorium as a nuclear fuel
| | |
|
ARTICLES RELATED TO Thorium - History | | | |  Thorium - History: Encyclopedia II - Thorium - HistoryThorium was discovered in 1828 by the Swedish chemist Jöns Jakob Berzelius, who named it after Thor, the Norse god of thunder. The metal had virtually no uses until the invention of the lantern mantle in 1885.
The name ionium was given early in the study of radioactive elements to the 230Th isotope produced in the decay chain of 238U before it was realized that ionium and thorium were chemically identical. The symbol Io ...
See also:Thorium, Thorium - Notable characteristics, Thorium - Applications, Thorium - History, Thorium - Occurrence, Thorium - Thorium as a nuclear fuel, Thorium - Isotopes, Thorium - Precautions, Thorium - Reference Read more here: » Thorium: Encyclopedia II - Thorium - History |
| |
|
| | | | Thorium - History: Encyclopedia II - Thorium - Occurrence Thorium is found in small amounts in most rocks and soils, where it is about three times more abundant than uranium, and is about as common as lead. Soil commonly contains an average of around 6 parts per million (ppm) of thorium. Thorium occurs in several minerals, the most common being the rare earth-thorium-phosphate mineral, monazite, which contains up to about 12% thorium oxide. There are substantial deposits in several countries. Thorium-232 decays very slowly (its half-life is about three times the age of the earth) but other thorium ...
See also:Thorium, Thorium - Notable characteristics, Thorium - Applications, Thorium - History, Thorium - Occurrence, Thorium - Thorium as a nuclear fuel, Thorium - Isotopes, Thorium - Precautions, Thorium - Reference Read more here: » Thorium: Encyclopedia II - Thorium - Occurrence |
| |
|
| | | | Thorium - History: Encyclopedia II - Thorium - Precautions Powdered thorium metal is often pyrophoric and should be handled carefully. The thorium decay chain ends with an isotope of lead (208-Pb), but passes through an isotope of radon (220-Rn) (also called "thoron")[2]. Radon gas is a radiation hazard. Good ventilation of areas where thorium is stored or handled is therefore essential.
Exposure to thorium in the air can lead to increased risk of cancers of the lung, pancreas and blood. Exposure to thorium internally leads to increased risk of liver diseases. This element has no know ...
See also:Thorium, Thorium - Notable characteristics, Thorium - Applications, Thorium - History, Thorium - Occurrence, Thorium - Thorium as a nuclear fuel, Thorium - Isotopes, Thorium - Precautions, Thorium - Reference Read more here: » Thorium: Encyclopedia II - Thorium - Precautions |
| |
|
| | | | Thorium - History: Encyclopedia II - Thorium - Isotopes Naturally occurring thorium is composed of one isotope: 232-Th. twenty five radioisotopes have been characterized with the most {abundant and/or stable} being 232-Th with a half-life of 14.05 billion years, 230-Th with a half-life of 75,380 years, 229-Th with a half-life of 7340 years, and 228-Th with a half-life of 1.92 years. All of the remaining radioactive isotopes have half-lifes that are less than thirty days and the majority of these have half lifes that are less than ten minutes. This element also has one meta state.
The isotopes of thorium range in atomic weight from 2 ...
See also:Thorium, Thorium - Notable characteristics, Thorium - Applications, Thorium - History, Thorium - Occurrence, Thorium - Thorium as a nuclear fuel, Thorium - Isotopes, Thorium - Precautions, Thorium - Reference Read more here: » Thorium: Encyclopedia II - Thorium - Isotopes |
| |
|
| |
|
|
|
|
More material related to Thorium can be found here:
|
|
|
|
| |
