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: Chen Max
Aircraft icing is an common phenomenon when aircraft flying into clouds at the altitude between 0-8000km. Ice accretion may occur on some surfaces exposed to the ambient. It has been recognized for about 70 years. Aircraft icing may lead to seriously adverse effect on the...
By: Hoc Trinh
James Chadwick found the third elementary particle of the atom; the neutron. In 1919 Ernest Rutherford discovered the proton, a positively charged particle contained in the nucleus of the atom. Many were convinced that the proton was not the only particle in the nucleus. Most...
By: Mamoon Riaz
DNA stands for deoxyribonucleic acid. It is nature's creation but scientists keeps on unveiling it and tries to show the world its functions in our bodies. DNA is related to genetics. Gregor Mendel: Gregor Mendel is considered as the "Father of Genetics". He performed an...
Spartan program as a useful tool for modeling chemical reactions in research and education
By: Tarek Musslimani
Abstract Molecular modeling of chemical reactions using Spartan programs has proven to be a useful exercise yielding both thermodynamic and kinetic information about Diels-Alder electrocyclic systems comparable to experiment. The program suite is user friendly for both undergraduate and graduate students not familiar with the...
By: Dean L. Sinclair
Helium 4 has two liquid forms. Helium I, which is a "normal liquid," and Helium II, "He4II," to which it sharply converts at 2.174K. This strange material expands on cooling, has tremendous heat conductivity, a strange viscosity that it will climb up...
By: Ian Loft
Practices of Alchemy were common in ancient Egypt where customs regarding life after death influenced study and development of rudimentary chemistry. Efforts to preserve bodies and organs gave rise to experimentation with mixing fluids and different substances until the right combinations achieved the desired effect...
By: Bob Trowbridge
Was alchemy just another get-rich-quick scheme? The practice of alchemy cannot be traced back to its origins. It was certainly practiced by the Chinese prior to Christianity and was probably much farther back than that. It also existed in many other cultures including Egypt, where...
By: Lorraine Danella
The Origins of AlchemyThe roots and origin of the practice known as Alchemy take us back all the way to ancient Egypt, although many cultures throughout time have been involved in the seeking out of alchemy's secrets. Alchemy, the transmutation of base elements into gold...
By: Dean L. Sinclair
Since the discovery of the neutron in the 1930's, the neutron has held a fascinating place in chemical theory. One of the first things that was decided was that the neutron's existence explained the Periodic Chart of the Elements. "The neutrons exist in atomic nuclei...
By: Steven J. Wamback
Helium's Happy And Lazy Cousin: NeonIn the year 1898, scientists Sir William Ramsey and WilliamTravers discovered three Noble gases. They were krypton, xenon,and neon. The two scientists isolated the elements from liquid airby cooling air to very low temperatures and removing each compoundas it...

 

1 9 10 11 12 13 130
CHOOSE YOUR SCIENCES 360 TOPIC: