أظهرت تجارب رذرفورد نفاذ معظم جسيمات ألفا من خلال صفيحة رقيقة من الذهب لان معظم الذرة متعادلة الشحنة. سمك رقاقة الذهب في تجربة رذرفورد — تجربة رذر فورد لاختبار صلاحية نموذج

On consideration, I realized that this scattering backward must be the result of a single collision, and when I made calculations I saw that it was impossible to get anything of that order of magnitude unless you took a system in which the greater part of the mass of the atom was concentrated in a minute nucleus However, the actual results surprised Rutherford
Note that the image is not to scale; in reality the nucleus is vastly smaller than the electron shell Under the prevailing plum pudding model, the alpha particles should all have been deflected by, at most, a few degrees; measuring the pattern of scattered particles was expected to provide information about the distribution of within the atom

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أظهرت تجارب رذرفورد نفاذ معظم جسيمات ألفا من خلال صفيحة رقيقة من الذهب
series of experiments 1908-1913 by Hans Geiger and Ernest Marsden, directed by Ernest Rutherfofrd, at the University of Manchester, proving the existence fo the atomic nucleus through alpha particle scattering on gold foil
أظهرت تجارب رذرفورد نفاذ معظم جسيمات ألفا من خلال صفيحة
It was almost as incredible as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit you
اظهرت تجربة رذرفورد نفاذ معظم جسيمات الفا من خلال صفيحه رقيقه من الذهب لان معظم الذره متعادله الشحنه،
It was then that I had the idea of an atom with a minute massive center, carrying a charge
According to Rutherford: It was quite the most incredible event that has ever happened to me in my life They observed that a very small percentage of particles were deflected through angles much larger than 90 degrees
Rutherford's experiment consisted of a beam of , generated by the of , was directed normally onto a sheet of very thin foil in an evacuated chamber A screen at the focus of a microscope was used as a detector; the screen and microscope could be swivelled around the foil to observe particles deflected at any given angle

Although many of the alpha particles did pass through as expected, many others were deflected at small angles while others were reflected back to the alpha source.

سمك رقاقة الذهب في تجربة رذرفورد — تجربة رذر فورد لاختبار صلاحية نموذج
اظهرت تجارب رذرفورد نفاذ معظم جسيمات ألفا من خلال صفيحة رقيقة من الذهب لأن معظم الذرة متعادلة الشحنة
تجربة رذرفورد