By: Jim J Jones
First developed by Russian schoolteacher Viktor Mendeleev, the Periodic Table (a.k.a. Mendeleev's Table) is a chart that shows the elements arranged by atomic number and chemical properties. The periodic table (picture here) is a grid, 18 blocks across and 7 blocks high. There...
Understanding the law of conservation of mass
By: Luke Buffington
There are a few fundamental laws that form the basis for all modern science. The most basic and fundamental law of all is called the law of conservation of mass. It forms the foundation for studying chemical reactions and the properties of compounds. It is...
How fireworks get their colors
By: Nancy Seddens
The creation of a beautiful fireworks display is the result of both science and art. Fireworks require at a minimum: fuel, an oxygen producer, color producer and binder to hold everything where it should be, in addition to propellants and any special effects that might...
By: Jim J Jones
Niels Bohr's greatest contribution to chemistry was, arguably, to be the first to develop a physics-based model of the atom. The "Bohr Model" as it came be to known, incorporated the new ideas of quantum theory, and was the first step in chemistry's progression from...
By: Jim J Jones
Have you ever wondered how geckos manage to stick to walls? The answer is remarkably simple: the van der Waals force. The van der Waals force exists in all molecules that exhibit polarity, that is to say, it exists in all atoms that are negative...
The facts about pulsars
By: Roberto Chiodetti
The life of a pulsar Once upon a time the universe was thought to be a serene and peaceful place where nothing interesting was happening, unchanged and perfect. That was the time when religion ruled over humans knowledge. Then science happened and with it...
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...
By: T.S. Garp
The amazing story of Wendelle C. Stevens, a retired Air Force pilot-turned-UFO investigator and researcher. Ret. USAF Lt. Colonel Wendelle Stevens recalls seeing UFO's in the Artic region back in 1947. Wendelle C. Stevens was born January 18, 1923 and served in the Army Air...

 

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