Name ____________________ CHEM 1004 Homework #5 Spring 2011 Buckley This homework is due on Thursday, February 10, at class time. The assignment will be accepted up until the start of class on Monday, February 14, with a 20% penalty. Assignments turned in after class that day will receive no credit, though I will look through them if you want me to. 1. (7 points) Match each of the following names with the discovery most attributed to that individual. ______ Michael Faraday A. The atom consisted of a tiny nucleus with most of the mass and the positive particles. ______ Robert Millikan B. Determined positive charges were also produced in a cathode ray tube ______ J.J. Thomson C. Exploration of the interaction of electricity with matter ______ Eugen Goldstein D. Constructed the first cathode ray tube ______ William Crookes E. Discovered and named electrons ______ Ernest Rutherford F. Recognized as the individual most responsible for the current form of the periodic table ______ Dmitri Mendeleev G. Determined the mass to charge ratio of an electron. 2. (16 points) Complete the missing information in the following table. Isotopic Symbol 35 17 Cl 131 53 I 33 15 137 56 P Ba 2 # protons # neutrons #electrons Mass number