Unit 2: Structure of the Atom & Periodic Table

Unit Overview

Unit Arc

We begin with the question of what is everything made then observe that different objects have different colors. We study light and introduce a wave spectrometer to analyze light spectrums from different light sources. Wave properties are explored and the light spectrum of the sun is studied. We observe hot objects release light, like the sun, and probe the simplest element, hydrogen, for answers. We uncover the structure of the atom via the Thompson discovery of the electron, followed by the Rutherford experiment discovering the nucleus. We cover how broadcast radio waves and WiFi signals are made. Using this backdrop light spectra for the simplest element, Hydrogen, is revisited and shows some peculiar discrete behavior. The Bohr model is derived and assumptions analyzed. We extend the bohr model conceptually from a 2D circle to 2D standing waves using Chlandi plates, and discuss orbitals are the analogous 3D standing waves. The periodic table and elemental chemical reactivity and physical properties are connected to the arrangement of electrons in orbitals.