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: Alison Bowler
Radon Symbol: Rn Atomic Number: 86 Atomic Mass: 222.0 amu (atomic mass units) Melting Point: minus 71.0 C (202.15 K, minus 95.8 F) Boiling Point: minus 61.8 C (211.35 K, minus 79.24 F) Number of Protons: 86 Number...
By: Alison Bowler
Polonium Symbol: Po Atomic Number: 84 Atomic Mass: 209.0 amu (atomic mass units) Melting Point: 254.0 C (527.15 K, 489.2 F) Boiling Point: 962.0 C (1235.15 K, 1763.6 F) Number of Protons: 84 Number of Electrons: 84 Number...
By: Alison Bowler
Radium Symbol: Ra Atomic Number: 88 Atomic Mass: 226.0 amu (atomic mass units) Melting Point: 700.0 C (973.15 K, 1292.0 F) Boiling Point: 1737.0 C (2010.15 K, 3158.6 F) Number of Protons: 88 Number of Electrons: 88 Number...
Flash point - What is it, and what's its relevance?
By: Michael Capraro
Flash point is the lowest temperature at which a flammable liquid evolves sufficient vapor to form an ignitable mixture of those vapors in air.Well, that's about it. Short article. So, what's it to you? Consider an example you already (hopefully) know - you should...
By: Lynn Koh
Forget your high school chemistry textbooks. Learning the atoms and molecules isn't going to help you get that coffee stain off your shirt or pants.In our daily routine life, Chemistry may not seem a big deal to many of us. But the truth is...
By: James Savik
An atom is the smallest discrete division of an element that can maintain the properties of that element.The general idea of the atom is ancient. First proposed by the Greek philosopher Democritus in the fifth century BC, the word "atom" originally comes from the...
By: Yamuna Baral
Phonons are produced by atomic vibrations and propagate through the media at the velocity of sound (At least acoustic one). They can also be produced by interaction of a material with particles or fields. For example, when an electron is moving in a medium, it...
By: Lane Lundeby
IntroductionSolid-state 13C NMR characterization of soil and sediment samples is difficult for several reasons. Molecules in the solid state are "frozen" in a variety of different physical conformations. Since NMR gives information on the chemical environment of an atom, slightly different ordering of the molecules...
By: Matthew Vannette
The easiest way to actually determine the temperature of liquid nitrogen is with a constant pressure gas thermometer (we'll use CPGT for an abbreviation). This is also a method useful for determining absolute zero (see other articles regarding this temperature.A CPGT is a narrow...
By: Ian Loft
The discovery and use of chloroform revolutionised surgery in the first half of the nineteenth century. As an alternative form of anaesthetic to ether, the medical fraternity debated the comparative differences between these two agents for most of the 1800's. American Samuel Guthrie, German Justus...

 

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