Ch 5: Understanding Atomic Structure

Watch atomic structure video lessons and learn about Avogadro's number, diamagnetism, the Bohr model, and more. These easy-to-follow lessons are just a portion of our online study guide and video collection.

Understanding Atomic Structure - Chapter Summary and Learning Objectives

Watch as instructors in this chapter's video lessons break down the building blocks of matter into their subatomic particles. Learn how the number of protons, electrons, and neutrons can be used to determine an atom's mass and describe its energy levels. This chapter is designed to teach you:

• Key figures in the development of early atomic theory
• Characteristics of an atom's nucleus
• Rules determining an atom's electron configuration
• Conversion factors for calculating the mass and quantity of atoms
• Principles used to explain particle momentum

Video Objective
The Atom Identifies an atom's protons, neutrons, and electrons and explains how they determine an atom's electric charge.
Atomic Number and Mass Number Shows how to determine the atomic number and mass number of an atom and use its nuclear symbol to calculate the number of protons, neutrons, and electrons.
Early Atomic Theory: Dalton, Thomson, Rutherford, and Millikan Describes the findings of each of these scientists and their contributions to atomic theory.
Isotopes and Average Atomic Mass Explains what an isotope is and how isotope abundance relates to the atomic mass of an element.
Avogadro's Number: Using the Mole to Count Atoms Discusses Avogadro's number and explains why we use it to count atoms. The calculations used to determine the quantity and mass of atoms are also discussed.
Electron Configurations in Atomic Energy Levels Demonstrates the total number of electrons needed to fully occupy each main energy level and shows how to write an electron configuration for an atom of any element.
Atomic Structures: Pauli Exclusion Principle, Aufbau Principle & Hund's Rule Explains the Aufbau and Pauli exclusion principles and their rules. Hund's Rule is also discussed.
Diamagnetism and Paramagnetism Discusses the electron configurations causing diamagnetic and paramagnetic atoms.
Four Quantum Numbers: Principal, Angular Momentum, Magnetic & Spin Demonstrates steps for writing the principal, angular, magnetic, and spin quantum numbers for any electron in an atom.
The Bohr Model and Atomic Spectra Explains the Bohr model of the hydrogen atom and describes how it relates to atomic spectra.
The Heisenberg Uncertainty Principle: Definition & Significance Outlines factors of the Heisenberg Uncertainty Principle.
The de Brogile Hypothesis: Definition & Significance Discusses factors of the de Broglie Hypothesis.

12 Lessons in Chapter 5: Understanding Atomic Structure
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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