Monday, January 7, 2013

100 Greatest Chemistry Discoveries

100 Greatest Discoveries:

A Greek Philosopher discovered the first 4 main elements: earth, water, fire, and the primary air. Priestly (very well known for science) discovered mercury and created the first technology to contain a controlled amount of liquids and gasses that could be heated at a set temperature. He created and discovered many different elements including oxygen. A man named Jon Dalton, showed how elements combined in different proportion change and made up the word atomic weight. Joseph Lusoc then saw how mixed gasses produced twice the volume (when mixed) of the original gasses. Avogadro said that gas was made of many different molecules instead of just one substance. Vowler created inorganic urea on accident and Kekulai developed new ways to show bonds between molecules. Mendeley found 63 different elements and constructed cards to show their properties. He saw a pattern and eventually created the periodic table. Davy was the one who found out that compounds are made of several elements and when electricity is added to them, it can create new elements. This was called electrochemistry, and it led to aluminum, semiconductors, solar panels, LED displays, and rechargeable Li batteries. Robert Bunsen and Gustav Kerchief saw how elements put into fire changed the color of the flame. With this and the observation of light in a prism, he invented the first spectroscope. Today, the spectroscope is used to search for water and life on other planets from earth. Joseph Thompson discovered the electron while he was a professor at England Cambridge. He also realized that some atoms were radiant because of the electron configuration. Gilbert Louis developed the first model of an atom and saw how atoms can give up and accept electrons from other valence electrons of other atoms. On top of that, he found out how to create compounds. Shortly after him, Rebeck Rell tried to see which minerals emitted radiation. His technique was to put the mineral on unexposed photogenic plate. He did that with uranium and found it was the most radiant element out there. Marie and Pierre Curie continued on that idea and tried to isolate the elements responsible for radioactivity in uranium. She found that it was radium and it was a million times more radioactive than uranium. Later, man found out that there were many benefits from radioactive things in all areas of life. Shortly after they died from radiation poisoning, Jon Hyett created plastic which was essentially a way to exploit cellulose. Leo Baekeland discovered the first synthetic plastic and found that plastic was a polymer which is a chain of molecules. Carbon nanotubes were then found by Robert Kerl. He was looking for what interstellar matter was made of and in the process found this. They were only made of 60 atoms, no more, no less. It was also 100 times stronger than steel.

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