Chemistry

Every moment of every day, chemistry plays a part in all we experience. This branch of the Helium network humbly attempts to illuminate the vast array of chemical knowledge, making it accessible to all. Let our site inform, inspire, and awe you with chemical wonders.
Gas laws: Avogadro's law
By: Harry Stevens
An important part of chemistry today is understanding the kinetics and reactions of gases. Over the past several hundred years, chemistry with gases has been studied extensively, and from this research, several laws have been developed. One of the more well known laws is Avogadro's...
By: Kat Centeno
An element in different form is called an isotope. Cesium-137 is a radioactive isotope which is produced during nuclear fission. It is different from the Cesium, a non-radioactive element which has atomic mass of 133. Cesium-137 has an atomic mass of 137. Cesium-137 exists in...
By: Jack Merrywell
In order to understand the half-life of any individual isotope, such as Caesium-137, one must first understand the principle of half-lives generally. A half-life is the amount of time it takes for a radioactive isotope to release half of its radioactive nastiness. However, and somewhat...
By: Raven Carluk
Cesium-137 is an intriguing radioactive isotope because it is entirely man-made from uranium rather than its no-radioactive counterpart. It is a byproduct of nuclear fission, and while mostly used in medical equipment, it is also found in fallout from nuclear weapons testing and reactor meltdowns...
By: Virginia Gaces
Serum is the supernatant fluid when clotted blood has been centrifuged. It is the best specimen for most clinical chemistry laboratory tests because of its specific characteristics. Here are the reasons why serum is the best specimen. *Serum has less protein When blood clots, one...
By: Maffew James
Hydrogen peroxide is a strong oxidant with many valuable uses across a broad range of applications. The bleaching properties of hydrogen peroxide make it a useful tool to remove colour from wood pulp and textiles, whilst the fact that it breaks down into harmless water...
By: Andrew Willson
The radioactive isotope, Iodine-131, has been in the news recently because of the disaster at the Fukushima power plant in Japan. One term that keeps arising is ‘half-life’. At its most basic, the half-life of an isotope refers to the time it will take...
By: Alison Bowler
Plutonium is a radioactive element discovered in 1940 by Seaborg, McMillan, Kenned, and Wahl when they bombarded uranium with deuteron atoms using the 60-inch cyclotron at Berkeley, California. It is a transuranic element with the atomic number 94. For all industrial processes plutonium is considered...
The chemical composition of sapphires
By: J. Lang Wood
Sapphires are known for their deep, blue color and romantic history. The gemstone is associated with royalty, and in fact many of these stones can be found in the crowns of European royalty, as well as in the gem collections of ancient Asian potentates. Sapphires...
By: Michael Totten
Emeralds are a type of hexagonal beryl crystal. Pure beryl, or beryllium aluminum cyclosilicate, is always colorless. Most beryls found in nature are not pure. The type of impurity determines the color of the beryl crystal. In emeralds, the impurity is caused by chromium. Unlike...

 

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