+ 1-888-787-5890  
   + 1-302-351-4405  
 
 
 
 

Essay/Term paper: Rutherford's gold foil experiment

Essay, term paper, research paper:  Science Research Papers

Free essays available online are good but they will not follow the guidelines of your particular writing assignment. If you need a custom term paper on Science Research Papers: Rutherford's Gold Foil Experiment, you can hire a professional writer here to write you a high quality authentic essay. While free essays can be traced by Turnitin (plagiarism detection program), our custom written essays will pass any plagiarism test. Our writing service will save you time and grade.



Rutherford's Gold Foil Experiment


Rutherford started his scientific career with much success in local schools
leading to a scholarship to Nelson College. After achieving more academic
honors at Nelson College, Rutherford moved on to Cambridge University's
Cavendish laboratory. There he was lead by his mentor J.J. Thomson convinced
him to study radiation. By 1889 Rutherford was ready to earn a living and
sought a job. With Thomson's recommendation McGill University in Montreal
accepted him as a professor of chemistry. Upon performing many experiments and
finding new discoveries at McGill university, Rutherford was rewarded the nobel
prize for chemistry. In 1907 he succeded Arthur Schuster at the University of
Manchester. He began persuing alpha particles in 1908. With the help of Geiger
he found the number of alpha particles emitted per second by a gram of radium.
He was also able to confirm that alpha particles cause a faint but discrete
flash when striking luminescent zinc sulfide screen. These great
accomplishments are all overshadowed by Rutherford's famous Gold Foil experiment
which revolutionized the atomic model.
This experiment was Rutherford's most notable achievement. It not only
disproved Thomson's atomic model but also paved the way for such discoveries as
the atomic bomb and nuclear power. The atomic model he concluded after the
findings of his Gold Foil experiment have yet to be disproven. The following
paragraphs will explain the significance of the Gold Foil Experiment as well as
how the experiment contradicted Thomson's atomis model.
Rutherford began his experiment with the philosophy of trying "any dam
fool experiment" on the chance it might work.1 With this in mind he set out to
disprove the current atomic model. In 1909 he and his partner, Geiger, decided
Ernest Marsden, a student of the University of Manchester, was ready for a real
research project.2 This experiment's apparatus consisted of Polonium in a lead
box emitting alpha particles towards a gold foil. The foil was surrounded by a
luminescent zinc sulfide screen to detect where the alpha particles went after
contacting the gold atoms. Because of Thomson's atomic model this experiment
did not seem worthwhile for it predicted all the alpha particles would go
straight through the foil. Despite however unlikely it may have seemed for the
alpha particles to bounce off the gold atoms, they did. Leaving Rutherford to
say, "It was almost as incredible as if you fired a fifteen-inch shell at a
piece of tissue paper and it came back and hit you." Soon he came up with a new
atomic model based on the results of this experiment. Nevertheless his findings
and the new atomic model was mainly ignored by the scientific community at the
time.
In spite of the views of other scientists, Rutherford's 1911 atomic
model was backed by scientific proof of his Gold Foil Experiment. When he
approched the experiment he respected and agreed with J.J. Thomson's, his friend
and mentor, atomic theory. This theory proposed that the electrons where evenly
distributed throughout an atom. Since an alpha paritcle is 8,000 times as heavy
as an electron, one electron could not deflect an alpha particle at an obtuse
angle. Applying Thomson's model, a passing particle could not hit more than one
elctron at a time; therefore, all of the alpha particles should have passed
straight through the gold foil. This was not the case – a notable few alpha
particles reflected of the gold atoms back towards the polonium. Hence the mass
of an atom must be condessed in consentrated core. Otherwise the mass of the
alpha particles would be greated than any part of an atom they hit. As
Rutherford put it:
"The alpha projectile changed course in a
single encounter with a target atom. But
for this to occur, the forces of electrical
repulsion had to be concentrated in a region
of 10-13cm whereas the atom was known to
measure 10-8cm."

He went on to say that this meant most of the atom was empty space with a small
dense core. Rutherford pondered for much time before anouncing in 1911 that he
had made a new atomic model—this one with a condensed core (which he named the
"nucleus") and electrons orbitting this core. As stated earlier, this new
atomic model was not opposed but originally ignored by most of the scientific
community.
Rutherford's experiment shows how scientists must never just accept the
current theroies and models but rather they must constently be put to new tests
and experiments. Rutherford was truly one of the most successful scientists of
his time and yet his most renowned experiment was done expecting no profound
results. Currently, chemists are still realizing the uses for atomic energy
thanks to early findings from scientists such as Rutherford.


 

Other sample model essays:

Asimov On Chemistry by Isaac Asimov The Book Asimov on Chemistry by Isaac Asimov is a collection of seventeen essays that he wrote for The Magazine of Fantasy and Science Fiction. This boo...
Asymmetric Epoxidation of Dihydronaphthalene with a Synthesized Jacobsen's Catalyst Justin Lindsey 12/08/96 Chem 250 GG Professor Tim Hoyt TA: Andrea Egans Abstract. 1,2 diaminocyc...
Science Research Papers / Atom Book
Atom Book Hey kids! Today I'm going to introduce you to the world of atoms. Atoms are little things that you or anybody else have ever seen. Make up things like trees, cars, paper, even you...
Historical Development of Atomic Structure Yazan Fahmawi Sept. 30, 1995 T3 IBS Chemistry Ms. Redman The idea behind the "atom" goes back to the Ancient Greek society, where scientists ...
Medicine / AZT
AZT The AIDS virus is one of the most deadly and most wide spread diseases in the modern era. The disease was first found in 1981 as doctors around the United States began to report groups...
Chemical and Biological Weapons Chemical and biological weapons are the most dangerous threats that our soldiers face today. But just how much do most of us know about them? The Americ...
Science Research Papers / The Bunsen Burner
The Bunsen Burner In class on Monday. We learn how to use a Bunsen burner. We had to tell what was the hottest and coolest part of the flame. When we finish that. We had to take a wire and...
Cancer: The Costs, Causes, and Cures Cancer is a major killer of people all around the globe. We do not have a definite cure, but the amount of research done on this one disease costs on the...
Biography Term Papers / Albert Einstein
Albert Einstein March 14 1879 - April 18 1955 Born Ulm, Germany. Died Princeton, USA. Albert Einstein was a very famous Scientist, he was mostly famous for his theory of Relativity. ...
Science Research Papers / Catalytic Converters
Catalytic Converters Notice when a vehicle drives by nowadays, that it is so much quieter than those loud oldies that pour out the blue smoke. Ever wonder just what is underneath a vehicl...
Experience with Dream Essay - Reliable and great customer service. Quality of work - High quality of work.
Browns Mills, New Jersey, United States
Dream Essay - Very reliable and great customer service. Encourage other to try their service. Writer 91463 - Provided a well written Annotated Bibliography with great deal of detail per the rubric.
Browns Mills, New Jersey, United States
it is always perfect
Frederick, Maryland, United States
The experience with Dream Essay is stress free. Service is excellent and forms various forms of communication all help with customer service. Dream Essay is customer oriented. Writer 17663 is absolutely excellent. This writer provides the highest quality of work possible.
Browns Mills, New Jersey, United States
Only competent & proven writers
Original writing — no plagiarism
Our papers are never resold or reused, period
Satisfaction guarantee — free unlimited revisions
Client-friendly money back guarantee
Total confidentiality & privacy
Guaranteed deadlines
Live Chat & 24/7 customer support
All academic and professional subjects
All difficulty levels
12pt Times New Roman font, double spaced, 1 inch margins
The fastest turnaround in the industry
Fully documented research — free bibliography guaranteed
Fax (additional info): 866-332-0244
Fax (additional info): 866-308-7123
Live Chat Support
Need order related assistance?—Click here to submit a inquiry
© Dreamessays.com. All Rights Reserved.
Dreamessays.com is the property of MEDIATECH LTD