Ch 2: Atomic Structure in Chemistry

About This Chapter

Use these online video lessons to become familiar with atomic structure in chemistry. Learn about pioneering atomic theories, quantum numbers, atomic spectroscopy and Avogadro's number.

Atomic Structure in Chemistry - Chapter Summary

In this chapter on atomic structure, an instructor demystifies the inner workings of the atom, including the unique characteristics associated with subatomic particles. It opens with an introduction to the early atomic theories set forth in the 1800s by scientists John Dalton, Robert Millikan, Ernest Rutherford and J.J. Thomson. The instructor will also explain how protons, neutrons and electrons are used to calculate atomic numbers and mass numbers.

A key part of this chemistry lesson includes a discussion of Avogadro's number, whereby a mole (amount of substance) can be used to count atoms. You'll also learn about the four types of quantum numbers, including angular momentum, magnetic, principal and spin. This chapter will also provide information about:

  • Isotopes and average atomic mass
  • Electron configurations or activities in atomic energy levels
  • The Bohr's model of the atom and the origins of light
  • Atomic spectroscopy and photoelectric effects
  • The subatomic quarks found within atoms

Our video lessons on atomic structure and chemistry are taught by experienced and informed instructors who provide easy-to-follow explanations of this complex subject. Additional materials include lesson transcripts, where key terms are linked to text-based tutorials with more information. If you need to revisit an important part of the presentation, you can use the video tags to locate specific points without having to re-watch the entire video. You can also use the online self-assessment quizzes to see how well you understood the basic concepts covered in this chapter.

7 Lessons in Chapter 2: Atomic Structure in Chemistry
Test your knowledge with a 30-question chapter practice test
Early Atomic Theory: Dalton, Thomson, Rutherford and Millikan

1. 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.

Atomic Number and Mass Number

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.

Isotopes and Average Atomic Mass

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.

Avogadro's Number: Using the Mole to Count Atoms

4. 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.

Electron Configurations in Atomic Energy Levels

5. 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.

Four Quantum Numbers: Principal, Angular Momentum, Magnetic & Spin

6. Four Quantum Numbers: Principal, Angular Momentum, Magnetic & Spin

Each electron inside of an atom has its own 'address' that consists of four quantum numbers that communicate a great deal of information about that electron. In this lesson, we will be defining each quantum number and explaining how to write a set of quantum numbers for a specific electron.

The Bohr Model and Atomic Spectra

7. 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.

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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