Ch 3: Atomic Structure & Models

About This Chapter

These video lessons and self-assessment quizzes will help reinforce your knowledge or introduce you to new concepts about atomic structure and models. When you study with us, you will quickly become comfortable with these lessons.

Atomic Structure & Models- Chapter Summary

If you need a review the atomic structure and models, the lessons in this chapter will thoroughly cover these topics. This chapter covers topics such as the Rutherford Model, the Bohr Model and the Quantum Mechanical Model. After completing the chapter, you should obtain the following goals:

  • identify what an atom is
  • Provide examples of a subatomic particle
  • Summarize the cathode ray tube experiments
  • Contract the Chadwick model, Rutherford model, Bohr model, and Quantum Mechanical model
  • Learn the basics of the de Brogile hypothesis
  • Review the concepts of the Heisenberg principle
  • Explain the three principles of atomic structures
  • Recall the basics of electron placement

We present these lessons to you in both video and text format. The video lessons are short and engaging, lasting five to ten minutes each. The lesson transcripts cover everything in the video, and include bold terms and phrases to stress importance of certain areas of the lesson. You will be able to retain a great deal of information, which will help you retain as much information as possible before you are comfortable enough to move forward.

11 Lessons in Chapter 3: Atomic Structure & Models
Test your knowledge with a 30-question chapter practice test
The Atom

1. The Atom

Tune into this lesson to find out what matters about matter. What exactly is an atom? And, how do the atoms that make up the elements in the periodic table differ from one another?

What Is a Subatomic Particle? - Definition & Mass

2. What Is a Subatomic Particle? - Definition & Mass

A subatomic particle is a particle smaller than an atom. Learn more about how to identify subatomic particles through several examples, and test your knowledge with quiz questions.

J.J. Thomson's Cathode Ray Tube (CRT): Definition, Experiment & Diagram

3. J.J. Thomson's Cathode Ray Tube (CRT): Definition, Experiment & Diagram

J.J. Thomson's cathode ray tube experiments led to a very important scientific discovery, the electron. In this lesson learn what a cathode ray tube is and how J.J. Thomson made his discovery.

James Chadwick: Biography & Atomic Theory

4. James Chadwick: Biography & Atomic Theory

Learn about English physicist James Chadwick, who discovered the neutron and whose research helped launch the atomic weapons race and the Manhattan Project.

Rutherford Model of the Atom: Definition & Diagram

5. Rutherford Model of the Atom: Definition & Diagram

Though it is no longer the most accurate representation of an atom, at the time Rutherford's model was revolutionary. Learn about the development of the model of the atom and how it changed throughout history, then assess your knowledge with a quiz.

The Bohr Model and Atomic Spectra

6. The Bohr Model and Atomic Spectra

Do you ever wonder where light comes from or how it is produced? In this lesson, we are going to use our knowledge of the electron configurations and quantum numbers to see what goes on during the creation of light.

The Quantum Mechanical Model: Definition & Overview

7. The Quantum Mechanical Model: Definition & Overview

Discover the quantum mechanical model of the atom and determine the way in which it is different from the orbital model. Learn about the quantum mechanical properties of electrons, then take a quiz to test what you know.

The de Broglie Hypothesis: Definition & Significance

8. The de Broglie Hypothesis: Definition & Significance

The de Broglie hypothesis states that particles of matter can behave as both waves and particles, just like light. In this lesson, we'll learn the basics of the de Broglie hypothesis and how it related to other theories released at the same time.

Heisenberg Uncertainty Principle: Definition & Equation

9. Heisenberg Uncertainty Principle: Definition & Equation

The Heisenberg uncertainty principle is one of the core concepts in quantum mechanics. In this lesson, we define the uncertainty principle and learn more about its implications for physical science.

Atomic Structures: Pauli Exclusion Principle, Aufbau Principle & Hund's Rule

10. Atomic Structures: Pauli Exclusion Principle, Aufbau Principle & Hund's Rule

This lesson discusses the three main rules that govern how electrons fit in the atomic structure by filling the shells, subshells, and orbitals. We will also review the basics of quantum numbers before learning these principles.

Electron Configurations in the s, p & d Orbitals

11. Electron Configurations in the s, p & d Orbitals

Getting confused by long lists that start with 1s and seem to go on forever? Don't worry, this lesson on electron configuration will help you understand how to describe electron placement in no time.

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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