Department of Natural Sciences

Clayton College & State University

                                                                                                                                                                                                                                       November 5, 2003

 

Physics 3650 – Quiz 8

 

 

Name  ________SOLUTION_____________________________

 

  1. The atomic number of a given element is equivalent to which of the following?

 

    1. Number of protons in the nucleus.

 

    1.  Number of neutrons in the nucleus.

 

    1. Number of protons and neutrons in the nucleus.

 

    1. Number of electrons in the outer shell.

 

 

  1. Rutherford’s experiments involving the use of alpha particle beams directed onto thin metal foils demonstrated the existence of the following?

 

    1. Neutron.

 

    1. Proton.

 

    1. Nucleus.

 

    1. Positron.

 

 

 

  1. If a nucleus is determined to be 7.20 fm in diameter, what mass number does it correspond to?

 

r = r0 A1/3

 

A1/3 = r/r0

 

A =  (r/r0)3

 

A = (7.20 fm / 2.40 fm)3  = 27