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	gold foil experiment - Article and Reference from OnPedia.com
		The Gold foil experiment was an experiment done by Ernest Rutherford to determine the layout of the atom.
		He determined this by bombarding gold foil with alpha particles, and observing the scattering of these particles, a procedure requiring many hours in a darkened room watching for tiny flashes of light as the scattered particles struck a scintillant screen.
		Rutherford was surprised to observe that most of the particles passed through the foil without any deflection; under the plum pudding model, charge would be distributed thickly in the foil, and very few particles would avoid deflection.
	www.onpedia.com /encyclopedia/gold-foil-experiment (269 words)

	Gold foil experiment - Wikipedia, the free encyclopedia
		The Gold foil experiment, or Geiger-Marsden experiment was an experiment done by Hans Geiger and Ernest Marsden in 1909, under the direction of Ernest Rutherford at the Physical Laboratories of the University of Manchester which led to the downfall of the plum pudding model of the atom.
		A variety of different foils were used such as aluminium, iron, gold and lead along with different thicknesses of gold foil made by packing several pieces of very thin foil together.
		Given the very high mass and momentum of an alpha particle, the expectation was that the particles would pass through having being deflected by a tiny angle at most, with the number of particles penetrating falling off as the thickness of foil (and the atomic weight of its material) was increased; the remainder being absorbed.
	en.wikipedia.org /wiki/Gold_foil_experiment (673 words)

	Exp #2 Rutherford1
		Continue this experiment by obtaining the number of alpha particles scattered at different angles with gold foil as the target metal.
		Compare the data obtained in the gold foil experiment to the data from the copper foil experiment.
		Rutherford concluded from his experiments, that almost all of the mass of an atom was concentrated into a tiny "nucleus" at the atom's center.
	intro.chem.okstate.edu /HTML/SEXP2.HTM (2212 words)

	Quantum mechanics - Wikipedia, the free encyclopedia
		Experiments have been taken as confirming that quantum mechanics is correct and the real world cannot be described in terms of such hidden variables.
		The Everett many-worlds interpretation, formulated in 1956, holds that all the possibilities described by quantum theory simultaneously occur in a "multiverse" composed of mostly independent parallel universes.
		Ernest Rutherford's gold foil experiment disproved the plum pudding model of the atom which suggested that the mass and positive charge of the atom are almost uniformly distributed.
	en.wikipedia.org /wiki/Quantum_mechanics (4111 words)

	Scientists Behind the Atom
		Behind the foil was a detecting screen made of zinc sulfide that emitted a flash of light when it was struck by alpha particles given off by a few milligrams of radium (radon 222).
		Through this new experiment, we saw that some of the alpha particles were even deflected backwards so that they went away in the same direction that they had come from to hit the gold foil.
		The Gold Foil Experiment proved that all of the mass had to be in a smaller, more condensed area than that of the whole atom, to be able to deflect the alpha particles.
	www.angelfire.com /amiga2/linde4723/rutherford.html (697 words)

	Horace E. Walcott: The Flame and the Atom (Site not responding. Last check: 2007-10-23)
		The C.R.T. experiments and spectroscopy investigations enabled students to understand the basic principles, applications, and limitations of the Bohr and Quantum Mechanical models of the atom.
		Experiments emphasizing observation and hands-on activities facilitated understanding of atomic structure and stimulated interest in medical science careers.
		Rutherford's Gold Foil Experiment in a cloud chamber.
	www.science.subaru.com /teaching_ideas/p_horacewalcott.shtml (611 words)

	atomic concepts
		, and subsequent experiments with them in the 1860s, led to the proposal that small, negatively charged particles-electrons-are part of the internal structure of atoms.
		Scientists conducted an experiment where alpha particles were aimed at a thin layer of gold atoms.
		Based on this alpha particle experiment, state two conclusions that were made concerning the structure of an atom.
	www.chemcool.com /regents/atomicconcepts/aim1.htm (859 words)

	[No title] (Site not responding. Last check: 2007-10-23)
		Other experiments with discharge tubes suggested the existence of a positive particle with much greater mass (the
		Finally in the years between 1908 and 1911 Ernest Rutherford and his students Hans Geiger and Ernest Marsden performed the famous gold-foil experiment in which the nuclear arrangement of the atom was discovered.
		Rutherford's vision of the atom as a kind of "solar system" in miniature is what most people probably carry around in their heads.
	www.chemtopics.com /lectures/unit04/lecture1/l1u4c.htm (113 words)

	Ernest Rutherford (Site not responding. Last check: 2007-10-23)
		These equations predicted that the number of -particles scattered through a given angle should be proportional to the thickness of the foil and the square of the charge on the nucleus, and inversely proportional to the velocity with which the -particles moved raised to the fourth power.
		He concluded that all of the positive charge and essentially all of the mass of the atom is concentrated in an infinitesimally small fraction of the total volume of the atom, which he called the nucleus (from the Latin for little nut).
		Most of the -particles were able to pass through the gold foil without encountering anything large enough to significantly deflect their path.
	chemed.chem.purdue.edu /genchem/history/rutherford.html (994 words)

	[No title]
		This experiment bombarded a sheet of gold foil with a stream of positively charged subatomic particles.
		___________________________________________ ________________________________________________________________________________________________________________________________________________ Information: Rutherford’s experiment with the gold foil and other scientists’ experiments involving the atom showed there to be a central core of an atom with protons and neutrons in it.
		The results of his experiments basically stated that energy is not given off continuously, but in packets (quanta) of energy.
	www.sas.upenn.edu /~mockusma/rutherford.doc (491 words)

	A Little Nut: The Discovery of the Atomic Nucleus
		Rutherford had noticed that when a beam of alpha particles passed through a thin foil, its image on a photographic plate was blurred.
		The alpha particles were colliding with the atoms in the foil, and bouncing off at a small angle.
		In the first experiment, you saw what happened when the projectile and the target were identical.
	www.dpgraph.com /janine/nucleus.html (2648 words)

	Objections To The Bohr-Rutherford Model
		The beam trajectory being normal with respect to the foil, and therefore parallel to the internal lattice structure, would effectively prevent large angle deflections beyond the first two staggered layers of the cubic close-packed crystal structure.
		The thickness of the foil used in the experiment is cited, near enough, as 10
		In other words if the foil could have been reduced to only two layers thick the number of high angle deflections would have been essentially the same as that observed for the 100 atom thick foil.
	www.lnhatom.com /bohrrutherford.html (1616 words)

	The foil is extremely pliable, it can be bent or wrapped around objects with ease. (Site not responding. Last check: 2007-10-23)
		Foil (fencing), one of the three weapons used in modern fencing
		Comedic foil, (or comic foil), is the straight man in a comedy team.
		Bruce foil, a foil used on an outrigger to prevent a boat from heeling
	foils.in (135 words)

	AN OVERVIEW OF RUTHERFORD'S GOLD FOIL EXPERIMENT. Essay Sample. Free term papers for college students
		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.
		The foil was surrounded by a luminescent zinc sulfide screen to detect where the alpha particles went after contacting the gold atoms.
		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.
	www.essaysample.com /essay/000582.html (785 words)

	DOLORES GENDE: PhysicsQuest: ATOMIC DISCOVERIES
		The first evidence for sub-atomic particles came from experiments with the conduction of electricity through gases in sealed glass tubes at low pressures.
		When the atoms in a gas acquire a positive or negative electric charge, the gas is said to be ionized.
		Describe the experiment performed by Rutherford to investigate how uranium rays ionize gas.
	physicsquest.homestead.com /electron.html (320 words)

	unit 3 atomic structure (Site not responding. Last check: 2007-10-23)
		The results from the gold foil experiments performed by Rutherford altered Thomson’s model.
		The gold foil experiment proved there was a dense positive area (nucleus) in the center of the atom.
		To explain the results from his experiments Rutherford developed a new model which placed a positive nucleus in the center of the atom.
	www.msu.edu /~defores5/Units/unit3atomicstructure.htm (395 words)

	Gold foil experiment -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-23)
		The Gold foil experiment was an experiment done by (British physicist (born in New Zealand) who discovered the atomic nucleus and proposed a nuclear model of the atom (1871-1937)) Ernest Rutherford to determine the layout of the ((physics and chemistry) the smallest component of an element having the chemical properties of the element) atom.
		Until that time, the prevailing theory was the (Click link for more info and facts about Plum pudding model) Plum pudding model of the atom.
		His findings led Rutherford to the conclusion that the atom is mostly empty space, with most of the atom's mass concentrated in a relatively tiny centre, the (A part of the cell containing DNA and RNA and responsible for growth and reproduction) nucleus.
	www.absoluteastronomy.com /encyclopedia/g/go/gold_foil_experiment.htm (338 words)

	Rutherford atomic model
		The nucleus was postulated as small and dense to account for the scattering of alpha particles from thin gold foil, as observed in a series of experiments performed under Rutherford's direction in 1910-11 (see Figure).
		A thin section of gold foil was placed in front of the slit, and a screen coated with zinc sulfide to render it fluorescent served as a counter to detect alpha particles.
		Most alpha particles were observed to pass straight through the gold foil (see inset), which implied that atoms are composed of large amounts of open space.
	www.britannica.com /nobel/micro/514_59.html (441 words)

	A Little Nut: The Discovery of the Atomic Nucleus
		Rutherford had noticed that when a beam of alpha particles passed through a thin foil, its image on a photographic plate was blurred.
		The alpha particles were colliding with the atoms in the foil, and bouncing off at a small angle.
		In the first experiment, you saw what happened when the projectile and the target were identical.
	www.davidparker.com /janine/nucleus.html (2648 words)

	rutherford.html (Site not responding. Last check: 2007-10-23)
		Observe the path the alpha particles take as they encounter the gold foil and pass onto the zinc sulfide screen.
		The experiment uses a stream of high velocity alpha particles.
		Suggest a reason why this experiment would not have produced the same results if a thin foil of Lithium was used (aside from the technical difficulties of using this element).
	www.gis.net /~rwbirch/Lessons/rutherford.html (514 words)

	Encyclopedia: Gold foil experiment
		Image File history File links Download high resolution version (508x785, 146 KB) Summary Top: Expected results of Rutherfords gold foil experiment: alpha particles passing through the plum pudding model of the atom undisturbed.
		Ernest Rutherford, 1st Baron Rutherford of Nelson, OM, FRS (August 30, 1871 - October 19, 1937), called father of nuclear physics, pioneered the orbital theory of the atom notably in his discovery of rutherford scattering off the nucleus with his gold foil experiment.
		A schematic representation of the plum pudding model of the atom.
	www.nationmaster.com /encyclopedia/Gold-foil-experiment (1322 words)

	Indirect Measurement II (Site not responding. Last check: 2007-10-23)
		Though he could not see the atoms in the gold foil, he knew that if he watched where the alpha particles went after hitting the gold foil, he could draw conclusions about the gold atoms.
		Rutherford thought alpha particles against the gold foil would behave much like water against the wall, but he was very surprised to find most of the alpha particles went straight through the foil.
		This experiment led Rutherford to conclude that an atom is actually mostly empty space with a small, dense, positively charged nucleus in its center.
	landau1.phys.virginia.edu /education/outreach/8thgradesol/IndirectMeasure2.htm (1125 words)

	Modern Atomic Theory (Site not responding. Last check: 2007-10-23)
		In the late 1800s many scientists were experimenting with electricity to determine its nature and what it was.
		The experiment: Thomson demonstrated that electricity in the cathode ray tube could be deflected by positive and negative charges (towards (+) and away from (-)).
		The Experiment: Rutherford shot alpha particles at a thin gold foil.
	www.sunapee.k12.nh.us /smhs/academics/science/jiacopino/chemistry/outlines/OL_unit_3.htm (1074 words)

	Introduction to the particle physics, different tpyes of collisions and accelerations: Etacude.com
		For example, in the case of one of the major accelerator, CERN, is 27 kilometers around and the detectors are the size of four-storey houses.
		One of the earliest, most famous, classical example is the E. Rutherford (1871-1937) gold foil scattering experiment.
		The results of this experiment indicate the first modern view of the atomic structure.
	sciencepark.etacude.com /particle/introduction3.php (434 words)

	From Particle Physics to Quantum Physics
		Rutherford overturned Thomson's atom model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny, massive nucleus.
		Rutherford designed an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure.
		The gold foil was only 0.00004 centimeter thick, meaning on a few hundreds of atoms thick.
	www.cartage.org.lb /en/themes/Sciences/Physics/QuantumPhysics/ParticlePhysics/ParticlePhysics.htm (2917 words)

	SparkNotes: SAT Physics: The Discovery of the Atom
		In a series of experiments from 1909 to 1911, Ernest Rutherford established that atoms have nuclei.
		The idea of the experiment was to measure how much the alpha particles were deflected from their original course when they passed through the gold foil.
		The experiment would be like rolling a basketball across a court full of marbles: when the basketball hits a marble, it might deflect a bit to the side, but, because it is much bigger than the marbles, its overall trajectory will not be affected very much.
	www.sparknotes.com /testprep/books/sat2/physics/chapter19section2.rhtml (616 words)

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