About This Chapter
Atomic Structure and Components - Chapter Summary
This chapter's video lessons help refresh your memory of the structure and components of atoms. You may also learn a few new facts about topics like nuclear chemistry and radioactive decay. Instructors discuss atomic number, mass number, atomic mass, isotopes and more. Once you study all of the lessons in the chapter, you should be prepared to:
- Describe the size and structure of the nucleus
- Define electron shell
- Identify the properties of protons and neutrons
- Differentiate between atomic number, atomic mass and mass number
- List the types of isotopes
- Understand the connection between nuclear binding energy and mass defect
- Calculate, and identify the types of, radioactive decay
- Give examples of nuclear chemistry applications
- Explain the purposes of gas chromatography and mass spectroscopy
Some of the concepts covered in this chapter are complex, but our professional instructors use several graphics and examples to simplify them. Our videos are usually less than 10 minutes long and they include a timeline so you can easily rewatch excerpts. In addition, we provide transcripts of all of the video lessons as well as multiple-choice quizzes that you can use to check your understanding of the material.
1. Atomic Nucleus: Definition, Structure & Size
The atomic nucleus is the central part of the atom. There is a lot to be told by the structure of the atomic nucleus. This lesson goes through the structure of the atomic nucleus and other factors that the atomic nucleus tells us.
2. The Electron Shell
You may be familiar with the role of electrons in electrical devices, but did you know that electrons also determine the chemical reactivity of everything around you?
3. Protons: Definition, Charge & Mass
Protons can be found in the nucleus of every atom. While originally it had been thought that protons were a fundamental particle, recent research has shown that protons are made of quarks. This lesson will cover the properties of the proton.
4. Neutrons: Definition & Concept
Neutrons are the big guys of the atom. This lesson explains the structure of the neutron, its properties, and some of its influences on the function of the atom.
5. 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.
6. What is Atomic Mass? - Definition & Examples
Atomic mass is a characteristic of an atom that is a measure of its size. It is plays a major role in the chemical properties of elements. This article discusses atomic mass and how it is calculated.
7. What Are Isotopes? - Definition, Types & Examples
Not all atoms of an element are identical - atoms of the same element can have different numbers of neutrons. These different versions of the same element are called isotopes. In this lesson, we will discuss the examples and types of isotopes.
8. 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.
9. Mass-Energy Conversion, Mass Defect and Nuclear Binding Energy
When you hear the term 'nuclear power,' what comes to mind? Do you know where that energy and power is coming from? In this lesson, we are going to zoom in on the nucleus of a helium atom to explain how something as small as a nucleus can produce an extremely large amount of energy.
10. Types of Radioactive Decay and Their Effect on the Nucleus
What is meant by the term 'radioactive'? In this lesson we will break down the three main types of nuclear decay particles and discuss their composition, their effect on the nucleus, and their applications.
11. Half-life: Calculating Radioactive Decay and Interpreting Decay Graphs
What causes a radioactive particle to decay? We'll never really know, but our best guess lies in probability. In this lesson, we are going to focus on the half-life, a way of measuring the probability that a particle will react.
12. Fusion, Fission, Carbon Dating, Tracers & Imaging: Applications of Nuclear Chemistry
What can the sun do that we can't? How do carbon atoms 'date'? Are radioactive isotopes helpful in the medical field? The answers to these questions can be found in this lesson on the applications of nuclear chemistry.
13. Chromatography, Distillation and Filtration: Methods of Separating Mixtures
What are some ways that mixtures can be separated? Watch this video to explore several examples of ways you can separate a mixture into its individual components.
14. Gas Chromatography & Mass Spectrometry
Scientists interested in identifying the individual chemicals in a mixture use an instrumental method called gas chromatography mass spectrometry or GC-MS. Continue reading to learn about the ins and outs of this fascinating chemistry technique.
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