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Ch 9: Atoms & Moles

About This Chapter

This chapter on atoms and moles was designed to boost your comprehension of the subjects and their related components, featuring simple-to-follow video lessons orchestrated by professional instructors available for your questions.

Atoms and Moles - Chapter Summary

The lessons in this chapter flesh out various terms and concepts integral to the scientific study of atoms and moles. You will be given the opportunity to review the Bohr model, atomic mass, isotopes, and Avogadro's number. Additionally, these lessons have topics including all of the following:

  • The atomic spectra and nucleus
  • The electron shell and its configurations
  • The atomic and mass number
  • Forms of radioactive decay and their effect on the nucleus
  • The calculation of radioactive decay and interpretation of decay graphs
  • Fusion, fission, carbon dating, tracers and imaging
  • Defining molar mass

While this may seem like a lot of material, staying organized will be easy with the dashboard feature, which gives you a place to view all of your recent studying activity and keep track of your progress through the lessons. While there, you'll also have the chance to explore links to practice quizzes and additional courses relevant to your learning. You may also ask questions of our subject experts if you find yourself stuck at any given point.

13 Lessons in Chapter 9: Atoms & Moles
Test your knowledge with a 30-question chapter practice test
The Bohr Model and Atomic Spectra

1. 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.

Atomic Nucleus: Definition, Structure & Size

2. 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.

The Electron Shell

3. 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?

Atomic Number and Mass Number

4. 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.

What is Atomic Mass? - Definition & Examples

5. 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.

What Are Isotopes? - Definition, Types & Examples

6. 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.

Isotopes and Average Atomic Mass

7. 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.

Electron Configurations in Atomic Energy Levels

8. 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.

Types of Radioactive Decay and Their Effect on the Nucleus

9. 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.

Half-life: Calculating Radioactive Decay and Interpreting Decay Graphs

10. 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.

Fusion, Fission, Carbon Dating, Tracers & Imaging: Applications of Nuclear Chemistry

11. 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.

Avogadro's Number: Using the Mole to Count Atoms

12. Avogadro's Number: Using the Mole to Count Atoms

How do we move from the atomic world to the regular world? Because atoms are so tiny, how can we count and measure them? And what do chemists celebrate at 6:02 AM on October 23rd each year? In this lesson, you will be learning how Avogadro's number and the mole can answer these questions.

What is Molar Mass? - Definition, Formula & Examples

13. What is Molar Mass? - Definition, Formula & Examples

Compounds have mass, and this is what we call the molar mass. In this lesson, we will discuss the molar mass and go over examples on how to calculate it.

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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