
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. |
Introduction
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)
Wave-Frequency
De-Broglie
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
Animation
Emission-Spectra
Noble-gases-emission
Atomic-size
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