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.
By: G E Barr
Tungsten is a grayish white metal discovered in 1758 and derived from the Swedish word meaning "heavy stone". In 1753 a couple of Spanish chemists seperated Tungsten from Wolframite. At 6,292 F, it has the highest melting point of all metals. Its symbol is...
An overview about the chemical element Arsenic
By: Tasha Raymond
Atomic Number: 33Atomic Symbol: As Atomic Category: metalloidsAtomic Mass: 74.92Boiling Point: 603 degrees CelsiusAppearance: Metallic greyArsenic was first isolated by Geber (721 - 815), an Arabian alchemist. It is believed that Albertus Magnus (Albert the Great, 1193 - 1280) was the first European to...
By: Ernest Capraro
Sodium is always a crowd pleaser. As an alkali (Group I) metal, it reacts easily to lose an electron. In fact, it reacts so readily with other materials that it is never found in the pure state in nature. Most people are familiar with common...
By: Lynette Alice
Discovered in 1901 by French chemist Eugene-Anatole Demarcay, europium was one of the last rare earth metals (lanthanides) ever discovered. Demarcay discovered europium while studying samarium an element which had been discovered only twenty years earlier. Europium as may be expected was named for the...
By: Janet Grischy
Plutonium bears a name descended from the name of the Roman god of Hell. The name was not chosen by scientists being dramatic, however. It simply came next in the naming sequence scientists were following. In the periodic table, plutonium comes after neptunium. In the...
By: Lynette Alice
The chemical element tungsten carrying the chemical symbol of "W" is taken from a Swedish phrase which means "heavy stone." It is one ot the metals known as a transition metal with the highest melting point of any metal which is 6,170 degrees...
An overview about the chemical element Lawrencium
By: Alison Bowler
Lawrencium Symbol: Lr Atomic Number: 103 Atomic Mass: (262.0) amu (atomic mass unit) Melting point: 1627°C (1900 K or 2961°F) Boiling Point: Unknown Number of Protons: 103 Number of Electrons: 103 Number of Neutrons: 159 This element, which was first detected by...
By: Lynette Alice
The chemical element boron is the first element of the IIIA group on the periodic table of elements commonly known as the aluminum family. What distinguishes boron from it's sister elements in the aluminum family is that it is not a metal at all. Following...
By: Lynette Alice
In 1885 Austrian chemist Carl Auer (Baron von Welsbach) discovered neodymium in the mineral didymia which was extracted from ceria which was found in Sweden in 1803. After nearly a century of work with ceria several new elemnets were found along with nedymium. What follows...
The difference between exothermic and endothermic chemical reactions
By: John Traveler
A chemical reaction is an event involving electrochemical interaction between elements which result in the formation of ionic, covalent or hydrogen bonds. In some cases the reaction results in a release of heat energy while in others the absorption of it. In Chemistry these two...

 

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