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: Sherry Horton Blake
For those of you who think that this topic is related to "Matters," an album by the punk band Pulley, or "Matter," a science fiction book by Iain Banks, I am sorry to disappoint you. However, before you stop reading, let me assure...
By: Jim J Jones
The question "what is matter?" has two wildly different answers, depending on what the person asking the question is looking for. The simple, obvious, intuitive answer is that matter is anything that has mass and takes up volume. By contrast, the long, counterintuitive answer...
By: Jim J Jones
Ernest Rutherford's 1911 experiments with gold foil discovered that the atom's positive charge is concentrated in one place - a nucleus, as we now know it. Although Rutherford did not personally conduct the experiment (his assistants, Ernest Marsden and Hans Geiger, of "Geiger Counter" fame...
How fireworks get their colors
By: Sherry Horton Blake
Everyone loves to watch a firework display on the Fourth of July. However, if there were no bright colors (blues, greens, reds, etc.) it would not be nearly as fun. Instead of ooh's and aah's, you would probably hear umm and hmm. Black powder...
By: John Traveler
Atoms are the smallest bits of matter in the universe. Here on Earth, there are 92 different varieties of naturally occurring atoms which display an array of physical elemental properties. There are also some man-made atoms on Earth as well, and there is a good...
The components of an atom
By: John JS Smith
Though atoms are the building blocks of all matter, there are only three types of particles of which they are composed. The combinations of these particles determine the physical and chemical properties of atoms. The three varieties of particles are protons, neutrons, and electrons. The...
How isotopes are used
By: John JS Smith
Though every element has a specific number of protons and electrons, the number of neutrons varies within the same element. These variations are called isotopes. On the periodic table, the atomic mass of an element is closest to the element's most common isotope. There are...
By: John Traveler
At least two thousand years ago, the Chinese invented gunpowder, a mixture of charcoal, sulfur and potassium nitrate (saltpeter). Later on the Chinese used gunpowder to make rockets and by adding an explosive charge to their rockets, the incipient form of fireworks were introduced. The...
The components of an atom
By: Brian Dodson
The topic of this article is more than a bit ironic, as the term atom derives from the Greek word atamos, which means something that cannot be further divided. Nevertheless, atoms do have components, and we will take a quick trip through the substructure of...
By: Alison Bowler
Helium, the second element in the periodic table also the second lightest element and the second most common in the universe, has a number of uses. Despite being common in the universe Earth's atmosphere contains only 0.0005% of the element. Commercial supplies of the...

 

1 76 77 78 79 80 130
CHOOSE YOUR SCIENCES 360 TOPIC: