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Name: _______________________________________________ Date: _________ Period: _______ Page#: ________ Chapter 3 Review – The Atom Atomic Theory Fill in the major contributions of each scientist on the timeline. - John Dalton: - J.J. Thomson: - Ernest Rutherford: - Niels Bohr: Cathode Ray Tube Experiment by: _______________________________________________ A) Label the parts of the cathode ray tube below: ________________________ ________________________ B) Describe the cathode ray tube experiment. Use the diagram below to help illustrate the experiment. Draw an arrow to represent how the cathode ray bends to the charged plate. C) What were the two main discoveries that came from the cathode ray tube experiment? 1. 2. Gold Foil Experiment by: _______________________________ A) Label the parts of the gold foil experiment below: B) Describe the Gold Foil Experiment. Use the diagram below to illustrate the experiment. Draw arrows to represent the path of the alpha rays. C) What were the 3 major discoveries from the Gold Foil Experiment? 1. 2. 3. Draw the progression of the model of the atom below. Label the different parts of the atom. Thomson Rutherford Bohr 4. Subatomic Particles PARTICLE SYMBOL CHARGE LOCATION RELATIVE MASS PROTON NEUTRON ELECTRON How do you identify each of the following items from the periodic table? Protons = _____________________ Electrons (neutral atom) = _____________________ + Ion (Cation) = _____________________ - Ion (Anion) = _____________________ Neutrons = _____________________ Mass # = _____________________ Written in Hyphen Notation= _____________________ Element Name Nuclear Symbol Oxygen Atomic Number 8 Fe Copper What is an ion? What are the two types? Neutrons Electrons Mass Number 8 26 29 4He What is an isotope? Protons 56 35 2 2 Bohr Models Draw a Bohr model for each atom below. 31 15 P 14 N37 P= N= E= P= N= E= Average Atomic Mass An atom has three naturally occurring isotopes. One has a mass of 36 amu and an abundance of 1.34%, another has a mass of 38 amu and an abundance of 1.06%, and the last has a mass of 40 amu and an abundance of 97.6%. Calculate the average atomic mass.
