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
The element oxygen is vital to life. Even the anaerobic bacteria to which atmospheric oxygen is poisonous require water and oxygen forms 90% of the mass of water. It is the third most common element in the universe forming approximately 21% of Earth's atmosphere by...
By: Alison Bowler
Of all the 118 elements in the periodic table, many are solids at room temperature. While a number are gases, are only two elements are liquid at room temperature. These two are mercury and bromine. Mercury with a melting point of minus 38.83 C...
What was shown by Rutherford's gold foil experiment?
By: Helena Whyte
Ernest Rutherford's 1911 gold foil experiment showed that the positive charge and most of the mass of an atom was found in the center of the atom. He called this center of the atom the nucleus. Most of the alpha particles passed through the empty...
The components of an atom
By: Jamie Craig
Understanding Atomic Structure Atomic structure is actually remarkably simple to understand; despite the fact a definite atomic structure hadn't being cemented until the early 19th century. There are three main components to the atom: electrons, neutrons and protons. All three are summarised below. >>...
What was shown by Rutherford's gold foil experiment?
By: Nancy Seddens
Ernest Rutherford's gold foil experiment proved that most of the interior of an atom is comprised of empty space with most of the mass concentrated in a small dense nucleus. The experiment itself also referred to as the Geiger-Marsden experiment or the Rutherford experiment...
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...

 

1 75 76 77 78 79 130
CHOOSE YOUR SCIENCES 360 TOPIC: