# Chem1 Atoms, quanta and the periodic
table

The basics of atomic theory, including a conceptual presentation of elementary
quantum theory that is far more organized and understandable than we have
ever managed to accomplish in the classroom, and which involves a minimum
of mathematics. A three-level menu system allows easy navigation through
the thirty individually-accessible sections.

## Lesson summary

## Part I: The Nuclear Atom

**Lesson 1 - The Atom**

- The atom: history of an idea
- What atoms are made of
- The nucleus
- Problem Example: density of a neutron star
- Characterizing the atom
- Understanding nuclide notation

**Lesson 2 - Isotopes**

- About isotopes
- Problem exercises

## Part II - The Quantum Atom

**Lesson 3 - Waves and their properties**

- About waves, boundary conditions and standing waves
- Problem exercises (frequency-wavelength)

**Lesson 4 - The strange world of the quantum**

- Electromagnetic spectrum and black body radiation
- Light as a quantum particle: the photoelectric effect
- Wavelength of particles: the de Broglie relation
- Relativity and mass-energy equivalence
- Uncertainty Principle
- Tunnel effect

**Lesson 5 - The simplest atom**

- The hydrogen atom: a first look
- Atoms and music: the simplest orbitals
- Atomic quantum numbers and orbital types

**Lesson 6 - Electron configurations of the elements**

- Rules for orbital filling
- The first eighteen elements
- The rest of the elements (d- and f- orbitals)

## Part III: The Chemical Atom

**Lesson 7 - Atoms and the periodic table**

- Introduction: the shell model of the atom and the periodic
law
- Ionization energy
- Electron affinity
- Atomic radius
- Electronegativity

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