Question 1 ) What is the distance of closest approach of a 2 MeV proton to a gold nucleus ? How does this distance compare with those for a deuteron and an -particle of the same energy ?

Question 2 ) The measured nuclear spin and symmetry character of nitrogen with Z = 7 and A = 14 are 1 , symmetric . Show that these measured values disagree with the assumption that nuclei contain A protons and A-Z electrons

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