Electrons in Atoms

Objective

• Identify the inadequacies in the Rutherford atomic model
• Identify the new proposal in the Bohr model of the atom
• Describe the energies and positions of electrons according to the quantum mechanical model
• Describe how the shapes of orbitals related to different sub-levels differ

Vocabulary: energy levels - quantum - quantum mechanical model - atomic orbital

Objectives

• Describe how to write the electron configurations for an atom
• Explain why the actual electron configurations for some elements differ from those predicted by the aufbau principle

Vocabulary: electron configuration - aufbau principle - Pauli exclusion principle - Hund's rule

Objectives

• Describe the relationship between the wavelength and frequency of light
• Identify the source of atomic emission spectra
• Explain how the frequencies of emitted light are related to changes in electron energies
• Distinguish between quantum mechanics and classical mechanics

Vocabulary: amplitude - wavelength - frequency - hertz - electromagnetic radiation - spectrum - atomic emission spectrum - photons - Heisenberg uncertainty principle

Khan Academy - Orbitals and Electrons

Khan Academy - Orbitals and Electron Configurations

Khan Academy - Electron Configurations

Khan Academy - Electron Configurations II

PBS Video - Fabric of the Cosmos; Quantum Leap

PBS Video - The Illusion of Time

PBS Video - Development of Atomic Theory

Rutgers College Prep -Nature of Light pdf video

Rutgers College Prep - Bohr Atomic Model pdf video

Rutgers College Prep - Quantum Mechanics pdf video