CHEM 101-General Chemistry

Chapter 7 (Zumdahl 5th edition)


Atomic Structure and Periodcity

Fireworks Photo Caption

Before the nineteenth century, fireworks were confined mainly to rockets and loud bangs. Orange and yellow colors came from the presence of charcoal and iron filings. However, with the great advances in chemistry in the nineteenth century, new compounds found their way into fireworks. Salts of copper, strontium, and barium added brilliant colors. Magnesium and aluminum metals gave a dazzling white light. Fireworks, in fact, have changed very little since then.


Once we came to "believe in" atoms, it was logical to ask: What is the nature of an atom? Does an atom have parts, and if so, what are they? In Chapter 2 we considered some of the experiments most important for shedding light on the nature of the atom. Now we will see how the atomic theory has evolved to its present state.

In this chapter we will see that the modern theory of atomic structure accounts for periodicity in terms of the electron arrangements in atoms.

Lecture Outlines (Power-Point) 

Lecture #01: Radiation & Bohr' Model

Lecture #02: Quantum Mechanics & Numbers

Lecture #03: Atomic Structure and Periodicity

Lecture #04: Atomic Structure and Periodicity(contd)


Working exercises (web) 



Hydrogen Spectra

Quantum Numbers

Electronic Structure of Atoms and Ions

Homework Solution

Textbook problems #

38, 42, 46, 50, 56, 60, 68, 76, 80, 84, 88, 96, and 108