About This Chapter
How it works:
- Identify which concepts are covered on your atoms, elements, and the periodic table homework.
- Find videos on those topics within this chapter.
- Watch fun videos, pausing and reviewing as needed.
- Complete sample problems and get instant feedback.
- Finish your atoms, elements, and the periodic table homework with ease!
Topics from your homework you'll be able to complete:
- Branches of chemistry
- Physical and chemical properties of matter
- States of matter
- Atomic number and mass number
- Early atomic theory
- Isotopes and average atomic mass
- Groups and periods in the periodic table
1. 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.
2. Matter: Physical and Chemical Properties
How are substances identified? There are two major ways we can describe a substance: physical properties and chemical properties. Learn about how chemists use properties to classify matter as either a mixture or a pure substance.
3. States of Matter: Solids, Liquids, Gases, & Plasma
Learn the four states of matter in the universe: solid, liquid, gas and plasma. Learn about the differences in shape and volume among the four states, which of the states is the most common and why plasma conducts electricity.
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.
5. 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.
6. What Are Elements?
Look around you. What do you see? Elements are everywhere. They are the building blocks of all matter on Earth. In this lesson, we will discuss what an element is, how elements are written as symbols, and how elements are the building blocks of all matter.
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.
8. The Periodic Table: Properties of Groups and Periods
How is the periodic table like the map you used on your last road trip? In this lesson, you will be introduced to the periodic table, the road map of chemists. We will discuss how the elements are organized and how you can use this organization to identify some of their major physical properties.
9. Gallium: Uses & Facts
Did you know the light illuminating the number on your handheld calculator comes from a component containing gallium? Continue reading to learn how this is possible, what else gallium is used for, and other interesting facts.
10. 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.
11. Rutherford Model of the Atom: Definition & Diagram
Though it is no longer the most accurate representation of an atom, at the time Rutherford's model was revolutionary. Learn about the development of the model of the atom and how it changed throughout history, then assess your knowledge with a quiz.
12. S-Block Elements on the Periodic Table: Properties & Overview
Take a tour of the s-block of the periodic table and get to know the elements inside. Learn all about the s-block elements, including some of their distinguishing properties, then quiz yourself on your knowledge.
13. Spin Quantum Number: Definition & Example
There are four quantum numbers that describe the configuration of an electron. In this lesson, we will discuss the fourth quantum number, which is called the spin quantum number. This describes an electron's orientation within an atom.
14. Stereoisomers: Definition, Types & Examples
Discover what a stereoisomer is and why they are so important in chemistry, biochemistry, and medicine. This lesson teaches how to identify a stereoisomer and distinguish it from other types of isomers.
15. The Element Krypton: History, Facts, Uses & Properties
Krypton is an element on the periodic table and belongs to the family of unreactive noble gases. Learn about this gaseous element's history, uses and chemical properties, as well as some fascinating facts.
16. The Element Neon: History, Facts & Uses
Neon signs have been iconic in America since the 1920's and are still common today. In this lesson, we will find out how neon was discovered and why it has been so important to us.
17. Trace Elements: Definition & Explanation
In this lesson, you will learn the definition of trace elements and their importance in many different systems. We will introduce the topics of trace elements in earth science, the human body, and the environment.
18. Transition Metals: Definition, List & Properties
The heart of the periodic table is home to some of the most famous metals, the transition metals. Learn the definition of a transition metal, look at a list of them, and learn some of their properties. Then, assess your knowledge with a quiz.
19. Uranium: Definition & Uses
Mention of the word uranium most likely conjures up images of mushroom clouds or evacuation zones around nuclear power plants. But uranium itself is not inherently dangerous. You'll learn about this interesting element in this lesson.
20. Valence Electron: Definition, Configuration & Example
Electrons are an essential part of an atom. Unlike protons and neutrons, valence electrons take part in the excitement of a chemical reaction. Learn how to find the number of valence electrons of any element in this lesson.
21. Weak Acids: Properties & Examples
Whether you realize it or not, you eat or use weak acids on an everyday basis. In this lesson, you'll learn about the definition and properties of weak acids and become familiar with some examples.
22. What Are Atoms? - Definition & Structure
An atom is the basic building block of all matter. Everything in existence is made up of atoms. Learn more about the atom, its history and structure, then test your knowledge with quiz questions.
23. What Is a Subatomic Particle? - Definition & Mass
A subatomic particle is a particle smaller than an atom. Learn more about how to identify subatomic particles through several examples, and test your knowledge with quiz questions.
24. What is an Energy Level of an Atom? - Definition & Equation
In this lesson, you will learn about the possible energy states that an electron can have in an atom. You will also understand how these energy levels give rise to the light emission spectra of individual atoms.
25. What is Argon? - Facts, Properties & Uses
Argon is abundant in our atmosphere but evaded discovery until the late 1800s. In this lesson, we will look at how argon was discovered, its properties and how we use it. A quiz will test our knowledge.
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