Wednesday, December 2, 2015

J.J Thompson


J.J Thompson had been trying to figure out what the structure of an electron was for some time, and one day when he was hungry he had some plum pudding. Apparently the way his plum pudding looked that day that’s what he figured the electron looked like.j-j-thomson.jpg

Thompson discovered the electron in 1897. Later he then found evidence that the stable elements are able to exist as isotopes and he invented the mass spectrometer.
He then did an experiment to discover the charge to mass ratio of the electron. He wanted to dig deeper into his discovery.

57.jpg

Thompson’s Mass Spectrometer Model. Broken down and labeled.







thomson-model.png

J.J Thompson’s final model of an electron. Where the pudding is the positively charged cloud and the plums are the electrons.



Ernest Rutherford

Ernest Rutherford


Ernest Rutherford was born on August 30, 1871 in Brightwater, New Zealand. He had passed away on October 19, 1937 . His wife was named Mary Georgina Newton. Ernest Rutherford attended Havelock School. Soon after he had gone to Nelson College where he proceeded to win a scholarship to attend Canterbury college, University of New Zealand. Ernest Rutherford went on to become a well respected chemist and has won many awards such as the Nobel Prize in Chemistry, Copley Medal, Elliott Cresson Medal, Franklin Medal, Rumford Medal, Matteucci Medal, Faraday Medal, and the Faraday Lectureship Medal.  

He was awarded for the Nobel Prize in Chemistry in 1908 and moved in 1907 to the University of Manchester, where he proved that alpha radiation is helium nuclei.
He was widely credited with first splitting the atom in 1917 in a nuclear reaction between nitrogen and alpha particles in which he also discovered and named the proton. Rutherford became Director of the Cavendish Laboratory at the University of Cambridge in 1919.

A diagram of the Gold Foil Experiment
Rutherford’s most successful experiment was the Gold Foil Experiment, he shot alpha rays through gold foil and hypothesized that the alpha rays would be completely deflected because the paradigm at the time was the "plum pudding" model in which the atom was thought to be composed of electrons. When he did the experiment most rays passed through the foil, baffling him, while only some were repelled and knocked back, proving that like forces repel and opposite forces attract. He concluded that 99% of the mass of the atom is located in the nucleus, that the nucleus is minuscule, and that the charge of the nucleus is positive. In summation he disproved the "plum pudding" model and proved the existence of the nucleus in the atom.
http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1908/rutherford-bio.html
http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/atomic-and-nuclear-structure/rutherford.aspx


Wednesday, October 28, 2015

Joseph Louise Proust 3

Ernest Rutherford 2




Ernest Rutherford did the Gold Foil Experiment, he shot alpha rays through gold foil and hypothesized that the alpha rays would pass through the foil with little to no deflection. When he did the experiment most passed

Ernest Rutherford was born on August 30, 1871 in Bright Water, New Zealand. He died October 19, 1937 in Cambridge, United Kingdom. Ernest Rutherford's spouse was named Mary Georgina Newton. Ernest first studied at havelock school. Then he had gone to Nelson College, an all boys secondary school in Nelson, New Zealand. After he had won a scholarship to attend Canterbury College, University of New Zealand.    

Tuesday, October 27, 2015

Antoine Lavosier 2.0

Antoine Lavoisier
https://www.youtube.com/watch?v=x9iZq3ZxbO8

He was born on August 26, 1743 and he died May 8, 1794. He was born in Paris, France. In 1769, he worked on the 1st geological map of France.

Wednesday, October 21, 2015

Ernest Rutherford

The Alchemists

The Alchemists

Brewing the Elixir.
Philosopher's Stone
The first chemists, or protochemists, were the Alchemists, whose goals were to achieve perfection, enlightenment and heavenly bliss by creating a philosopher's stone and the elixir of life. The stone would be able to turn lesser base metals such as mercury or lead into noble metals such as silver and gold (probably to get rich) and the elixir would rejuvenate and confer immortality, or at least longevity.

Alchemy first began in China and Egypt around the 5th century BCE, and saw a surge in the middle ages in Europe. By the 18th century it was abandoned for what is now modern chemistry and medicine, but today's body of scientific knowledge has its roots in alchemy.
Creating light through magic.

Casting a spell.
Some of the more popular incarnations of Alchemists are wizards and necromancers. In addition to Europe, records of alchemy are found in Egypt, the old Islamic world, China and India. References to alchemy have been found written in Sanskrit.


This famous Chinese symbol, the Taoist taijitu, is originally from Chinese Alchemy.

 So what did these guys do?


A famous Alchemical diagram.
In their pursuit of the elixir and the stone, Alchemists developed the experimental method and basic laboratory techniques, versions of which are still used today!
They theorized as to what matter is and suggested that all matter stems from the four basic elements: earth, fire, air and water.
An early lab.
From this stemmed basic terminology and the idea that matter can be classified.
While alchemy had a profound effect on the development of science, it differs quite a bit from real science since it embraced Hermetic ideas of magic, religion, mythology and spirituality. Cryptic symbols and mystical tales were integral parts of alchemy. 
The universe according to Alchemists.
Magnum Opus, latin for "The Great Work", is an alchemical term for the process of creating the philosopher's stone and is attached to laboratory processes of a series of four stages of chemical color changes:

Overall, Alchemists led the way to the "chemical" industries of the day—ore testing and refining, metalworking, production of gunpowder, ink, dyes, paints, cosmetics, leather tanning, ceramics, glass manufacture, preparation of extracts, liquors, and so on. Alchemists contributed distillation to Western Europe, which is how alcoholic beverages are made. Alchemists attempted to arrange information on substances, so as to clarify and anticipate the products of their chemical reactions, and this resulted in early conceptions of chemical elements and the first rudimentary periodic tables. They learned how to extract metals from ores, and how to compose many types of inorganic acids and bases.

Page from alchemic treatise of Ramon Llull, 16th century.
During the 17th century, practical alchemy started to disappear in favor of its younger offshoot chemistry, Robert Boyle, the "father of modern chemistry".  In his book, The Skeptical Chymist, Boyle attacked Paracelsus and the natural philosophy of Aristotle being taught at universities. However, Boyle's biographers, in their emphasis that he laid the foundations of modern chemistry, neglect how steadily he clung to alchemy, in theory, practice and doctrine. The decline of alchemy continued in the 18th century with the birth of modern chemistry, which provided a more precise and reliable framework within a new view of the universe based on rational materialism.

Here are some videos about Alchemy: