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: David Wright
Water is a molecule made up of two hydrogen atoms and an oxygen atom. This is a molecule that is hugely important in both biology and chemistry. Chemically speaking water has a permanent dipole as oxygen is more electronegative than hydrogen and so attracts the...
By: notmuch
The formal definition for an ion is an "atom or group of atoms with one or more positive or negative electric charges" (Encyclopedia Britannica).To explain the process of atoms forming ions, we must first consider the structure of the atom. In simple terms, at...
By: notmuch
The study of the element carbon and its compounds is often described as the study of organic chemistry. Indeed, the amount of knowledge about carbon compounds is now so great that organic chemistry and inorganic chemistry have come to be recognized as important disciplines in...
By: Ernest Capraro
Assuming you aren't asking about "The Simpsons", where the Isotopes are Springfield's less than stellar baseball team, read on.Every ELEMENT is defined by the number of PROTONS found in its nucleus.An ISOTOPE is a particular variant of an element, defined by the number...
By: Ernest Capraro
You'll find four major categories of chemical names out there. Three of them are scientific, and have rules that are easy to follow (until you get to large, complex molecules anyway). The fourth are simply made-up names - either a name assigned by the...
By: Ernest Capraro
The transition metals are those elements found in the "d" block of the periodic table. If you aren't familiar with that terminology, looking at the periodic table, the "d" block is the section beginning with the third column from the left and reaching all the...
By: David Claiborne
The tradition of alchemy dates back at least to the middle of the first millennium B.C., and probably reaches as far back as prehistoric times. It was, and is, a psychospiritual method whose ultimate aim was the "Great Work," the refining of the...
By: Ernest Capraro
It is a misconception that we can add color to a flame. The flame that we see is the light emitted by various atoms as their electrons are excited by the heat energy of combustion. The wavelength (color) of light that is given off is...
By: Ernest Capraro
Alum - potassium aluminum sulfate - KAl(SO4)2 is one of the more popular crystals to grow. This may be because it makes a nice octahedral crystal that is visually appealling, or because it isn't terribly toxic. It probably also has a lot to do with...
By: Dawn Sundene
The identification of chemical substances is both simple and complex. Every chemical, whether it is an element or a compound, has unique characteristics. It's kind of a fun puzzle to identify what you might have when given a set of 'mystery' substances in a chemical...

 

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