Chapter 2 Student competencies

• State and explain the four major postulates of Dalton's atomic theory.
• State and understand the law of conservation of mass, the law of multiple proportions, and the law of electrostatic attraction..
• Describe Thomson's cathode ray experiment and Millikan's oil-drop experiment.  Identify the electron properties that were measured from each.
• Understand radioactivity and describe the particles associated with three most common forms.
• Describe Rutherford's alpha particle gold-foil experiment and understand the implications of it on atomic structure theory.
• Describe the modern view of atomic structure in terms of the three subatomic particles.  Understand the location of these within the atom, their charges and  relative masses. Understand the relative sizes of the nucleus and atom.
• Know what is meant by an atomic mass unit and an angstrom.
• Know the following terms: isotopes, atomic number, mass number, and nuclide.
• Be able to identify the number of protons, neutrons, and electrons in a given atom or ion.
• Draw the complete chemical symbol for a given nuclide.
• Understand the arrangment of the periodic table; identify groups, periods, alkali metals, alkaline earth metals, halogens, and inert gases; differentiate among metals, metalloids, and nonmetals.
• For a given compound, write the chemical formula, molecular formula, empirical formula and structural formula.
• Know what anions, cations, and polyatomic ions are.
• Use the periodic table to predict the charges of common ions found in ionic compounds.  Use this information to write the formula for a given ionic compound.
• Be able to name a given inorganic compound; be able to write the formula for a given name.
• Know the names for common polyatomic cations and anions, and oxyanions.
• Know how to name a given acid.
• Know how to name a binary molecular compound.