About This Chapter
Who's it for?
Anyone who needs help learning or mastering college-level general chemistry material will benefit from taking this course. There is no faster or easier way to learn college-level general chemistry. Among those who would benefit are:
- Students who have fallen behind in understanding early atomic theory or working with atomic and mass numbers
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning science (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about atoms
- Students who struggle to understand their teachers
- Students who attend schools without extra science learning resources
How it works:
- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the Atoms chapter exam.
Why it works:
- Study Efficiently: Skip what you know; review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the Atoms chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any atoms question. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
This chapter helps students review the concepts in an Atoms unit of a standard college-level general chemistry course. Topics covered include:
- Isotopes and average atomic mass
- Avogadro's number
- Electron configurations in atomic energy levels
- Quantum numbers, including principal, angular momentum, magnetic and spin
- The Bohr model and atomic spectra
1. 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.
2. 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.
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. 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.
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.
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.
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.
8. The Three Isotopes of Hydrogen
When we are looking at the atomic number of an element in the periodic table, we may not know it, but these elements may have isotopes. This depends on the number of their neutrons. In this lesson, we will learn about the three isotopes of hydrogen.
9. Absorption Spectroscopy: Definition & Types
In this lesson, we'll learn about absorption spectroscopy. Read on to learn how this spectroanalytical procedure works, what it can be used for and different kinds of absorption spectroscopy, then test your knowledge with a quiz.
10. The Aufbau Principle
The Aufbau principle explains how electrons fill up orbitals and shells inside an atom. It is used by chemists to predict the types of chemical bonds that an atom is likely to form. Learn more about it in this lesson.
11. Robert Millikan: Biography, Atomic Theory & Oil Drop Experiment
Learn about the life and achievements of American physicist Robert Millikan. His oil drop experiment helped to quantify the charge of an electron, which contributed greatly to our understanding of the structure of the atom and atomic theory.
12. Cations: Definition & Examples
In this lesson, you will learn that cations are positively charged atoms, and you will discover how they are formed. You will also become familiar with some common cations, and you should be able to determine which atoms form cations.
13. Henry Moseley: Biography & Atomic Theory
Physicist Henry Moseley discovered the atomic number of each element using x-rays, which led to more accurate organization of the periodic table. We will cover his life and discovery of the relationship between atomic number and x-ray frequency, known as Moseley's Law.
14. Absolute Configuration: Rules & Example
Learn the rules for assigning the absolute configuration at a chiral carbon atom in an organic molecule, as well as how to assign R and S stereochemistry. You'll also see examples that will help you approach problems involving stereochemistry.
15. What is Chemistry? - Definition, History & Branches
Known as the central science, chemistry is integral to our understanding of the natural world around us. In this lesson, you'll be introduced to the field of chemistry, learning about its history and its modern applications.
16. Hydrogen: Properties & Occurrence
Hydrogen is the most commonly found element in the universe. In this lesson we will learn about properties of hydrogen, from its place on the periodic table of elements to its physical and chemical properties.
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Other chapters within the College Chemistry: Help and Review course
- Experimental Chemistry and Introduction to Matter: Help and Review
- The Periodic Table: Help and Review
- Nuclear Chemistry: Help and Review
- Chemical Bonding: Help and Review
- Liquids and Solids: Help and Review
- Gases: Help and Review
- Solutions: Help and Review
- Stoichiometry: Help and Review
- Chemical Reactions: Help and Review
- Equilibrium: Help and Review
- Kinetics: Help and Review
- Thermodynamics: Help and Review
- Chirality in Organic Chemistry: Help & Review
- Stereochemistry: Help & Review