Part 1: Learning Objectives-Atomic Structure of Matter

You will be able to:

1. describe the origin of atomic theory.
   summarize Dalton’s model of the atom. What postulates have been supported and refuted by modern experiments?
   state the law of definite proportions.
   state the law of multiple proportions.

2. describe the Thomson plum-pudding model of the atom. What experimental evidence gave rise to this model?
   describe the Rutherford model of the atom. What experimental evidence gave rise to this model?
   state the relative charge and mass of the electron, proton, and neutron.

3. explain and illustrate the concept of isotopes.
   write the appropriate atomic notation for an isotope.
   explain the concept of relative atomic mass

Readings (CK-12 Chemistry):

1.

4.1  Democritus' Idea of the Atom

4.2  Law of Conservation of Mass

4.3  Law of Multiple Proportions

4.4  Law of Definite Proportions

4.5  Mass Ratio Calculation

4.6  Dalton's Atomic Theory

2.

4.7  Atom

4.8  Electron

4.9  Proton

4.10  Neutron

4.11  Cathode Ray Tube

4.13  Plum Pudding Atomic Model

4.14  Gold Foil Experiment

4.15  Atomic Nucleus

3.

4.16  Atomic Number

4.17  Mass Number

4.18  Isotope

4.19  Atomic Mass Unit

Handouts and Links

Worksheets