About This Chapter
Atoms & Atomic Structure - Chapter Summary
The lessons in this chapter provide an overview of atoms and atomic structure. You'll find an informative discussion of early atomic theories, the Bohr model, and many other topics. After completing the chapter, you should be prepared to:
- Define atom, atomic number, and mass number
- Discuss isotopes and average atomic mass
- Explore electron configurations in atomic energy levels
- Provide examples of ionic bonds
- Demonstrate use of atoms and ions to determine molecular formulas
- Examine early atomic theories of Dalton, Thomson, Rutherford, and Millikan
- Explain the atomic theory of James Chadwick
- Describe the Bohr model
These video lessons are brief and engaging, which helps you to easily understand the information presented. Our expert instructors are effective and use plenty of examples. The video timelines allow you to navigate the learning process by going directly to the topics of your choice. Each lesson is accompanied by a brief multiple-choice quiz to test your knowledge. Full video transcripts are also available.
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?
2. Atomic Number and Mass Number
Atoms are the basic building blocks of everything around you. In order to really understand how atoms combine to form molecules, it's necessary to be familiar with their structure. In this lesson, we'll dissect atoms so we can see just what really goes into those little building blocks of matter.
3. Isotopes and Average Atomic Mass
When you drink a glass of water, you are actually drinking a combination of heavy water and light water. What's the difference? Is it harmful? This video will explain the difference between the two types of water and go into detail on the significance of the different isotopes of elements.
4. Electron Configurations in Atomic Energy Levels
This lesson will explain what the electrons are doing inside the atom. Tune in to find out how we specify where they are located and how this location description will help us predict an element's properties.
5. Ionic Bonds: Definitions and Examples
Did you know that when atoms stick together to form molecules, they gain and lose electrons, making them negatively or positively charged? In this lesson, you will learn how cations and anions form one type of chemical bond called an ionic bond.
6. Using Atoms and Ions to Determine Molecular Formulas
In this lesson, you will learn how atoms and ions determine molecular formulas. You will understand how molecular formulas tell information about the type and quantity of atoms involved in a molecule. Lastly, we will discuss how to write a molecular formula for an ionic compound.
7. Early Atomic Theory: Dalton, Thomson, Rutherford and Millikan
Imagine firing a bullet at a piece of tissue paper and having it bounce back at you! You would probably be just as surprised as Rutherford when he discovered the nucleus. In this lesson, we are going to travel back in time and discuss some of the major discoveries in the history of the atom.
8. 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.
9. Bohr Model: Definition & Equation
Explore the problem of the Saturnian atomic model, how the Bohr equation addresses this problem using the hydrogen atom, and what current theory has taken from the Bohr model to refine and improve on it.
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Other chapters within the GCSE Chemistry: Practice & Study Guide course
- Steps of the Scientific Method
- Analyzing & Evaluating Scientific Data
- The Process of Scientific Thinking
- Mathematics in Science
- Scientific Vocabulary & Measurement
- Properties of Elements, Compounds & Mixtures
- Understanding Elements & Periodicity
- Block & Group Elements
- Chemical Bonds Overview
- Molecular Types & Structures
- States of Matter Overview
- Quantitative Chemistry
- Chemical Changes
- Energy Changes in Chemical Reactions
- Rate & Extent of Chemical Changes
- Basics of Organic Chemistry
- Chemical Analysis
- Chemistry of the Atmosphere
- Using Natural Resources
- GCSE Chemistry Flashcards