Interpretation: The experiment which concludes that the atom contains a heavy positively charged nucleus which is surrounded by electrons is to be described.
Concept introduction: Rutherford’s atomic model describes that the nucleus of an atom is small and dense and possess positive charge and the electrons with negative charge revolves around the nucleus in a circular motion.
Answer to Problem 1A
Rutherford’s gold foil experiment.
Explanation of Solution
Rutherford took a radioactive element that decays naturally and emits alpha particles and enclosed it in a container with a hole in it through which a beam of alpha particles comes out. He placed a gold foil in which the beam strikes.
He noticed that most of the beam passes through while some bents at large angles and some bounced back. This can be possible only when the atom has a small and heavy region of positive charge in it.
There were a lot of theories which Rutherford failed to explain in his gold foil experiment.
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Chapter 11 Solutions
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