About This Chapter
Discover Health Occupations Readiness Test: Chemistry Basics - Chapter Summary
This chapter explores the fundamentals of chemistry, including states of matter, phase changes, and chemical reactions. Atoms, electrons, and the periodic table are also discussed. As you progress through the chapter, you'll learn how to write and balance chemical reactions, understand activation energy and catalysts, and chemical bonds. By the end of the chapter, you will be familiar with:
- States of matter
- Phase changes
- Covalent bonds
- The periodic table
- Chemical reactions
- Acids and bases
Short, engaging video lessons are followed by self-assessment quizzes to help you test your understanding of chemistry basics, and knowledgeable instructors are available to answer any questions you have. Transcripts accompany each video, and important terms are bolded. You can revisit key points from the video using the jump feature under the Timeline tab.
Chemistry Basics Objectives
This test is used to assess students' academic readiness to enter various healthcare roles. This Chemistry Basics chapter covers topics found in the Earth and Physical Science portion of the Science section in the Discover Health Occupations Readiness test. The Earth and Physical Science portion of the exam contains seven questions, which constitutes 9% of the total exam. Other areas tested include Reading, Mathematics, and English and Language Usage.
This exam is made up of four-option multiple-choice questions. There are 85 questions in all, and 105 minutes are given to complete the test.
1. 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.
2. Phase Change: Evaporation, Condensation, Freezing, Melting, Sublimation & Deposition
Substances on Earth can exist in one of four phases, but mostly, they exist in one of three: solid, liquid or gas. Learn the six changes of phase: freezing, melting, condensation, vaporization, sublimation and deposition.
3. The Atom
Tune into this lesson to find out what matters about matter. What exactly is an atom? And, how do the atoms that make up the elements in the periodic table differ from one another?
4. 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?
5. Covalent Bonding and Electron Shells: Definitions, Relationship & the Octet Rule
Learn about the different electron shells of atoms as well as the octet rule for valence electrons and how that applies to covalent bonding. Discover the definition of covalent bonding and the relationships between atoms.
6. 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.
7. Basic Properties of Chemical Reactions
Learn how about the various components of a chemical reaction, and how those components function. Use this lesson to understand the basic properties of different kinds of chemical reactions.
8. Activation Energy and Catalysts
Learn how to define activation energy and how it relates to a reaction's energy. Learn what an activated complex is and where it fits into an activation energy diagram. Discover how a catalyst works to change the activation energy of a reaction and what this means to metabolism in the body.
9. Redox (Oxidation-Reduction) Reactions: Definitions and Examples
This short video will explain oxidation-reduction reactions, or redox reactions for short. The focus is on how electrons are transferred during redox reactions. Learn some neat mnemonic devices to help you remember when an atom is oxidizing or reducing.
10. Acids and Bases
Have you ever wondered how we measure the acidity of liquids? Check out this lesson to see how acids and bases are measured on a pH scale and how they relate to neutral solutions, such as water.
11. Neutralization and Acid-Base Reactions
From this lesson, you will understand the neutralization process between acids and bases. Learn how a hydroxide ion from a base reacts with a hydronium ion from an acid to neutralize each other and form water. Discover what conjugate acids and bases are and what the definition of amphoteric is.
12. Enzyme Activity & Inhibition: Structure, Substrates, pH & Temperature
Enzymes appreciate the right working conditions. Can you blame them? We all work best in the correct environment. In this lesson, we'll learn how substrate concentration, temperature, and pH affect enzyme activity and structure.
13. Overview of Chemical Bonds
Learn about the most common kinds of chemical bonds: ionic, covalent, polar covalent, and metallic. Discover how they form and why they hold together. Take a quiz and see how much knowledge you've held onto.
14. Properties of Water
Why does ice float? Why can water rise on its own against gravity in a small tube? Find out how these mysterious properties of water can be explained by hydrogen bonds.
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Other chapters within the Discover Health Occupations Readiness Test: Practice & Study Guide course
- Discover Health Occupations Readiness Test: Reading Comprehension
- Discover Health Occupations Readiness Test: Analyzing Text Passages
- Discover Health Occupations Readiness Test: Literary Forms & Genres
- Discover Health Occupations Readiness Test: Understanding Reference Materials
- Discover Health Occupations Readiness Test: Interpreting Text & Images
- Discover Health Occupations Readiness Test: Using Consumer Information
- Discover Health Occupations Readiness Test: Understanding Grammar
- Discover Health Occupations Readiness Test: Using Punctuation
- Discover Health Occupations Readiness Test: Sentence & Paragraph Structure
- Discover Health Occupations Readiness Test: Basic Math Operations
- Discover Health Occupations Readiness Test: Word Problems in Math
- Discover Health Occupations Readiness Test: Basic Financial Math
- Discover Health Occupations Readiness Test: Algebra Basics
- Discover Health Occupations Readiness Test: Interpreting Data
- Discover Health Occupations Readiness Test: Measurement Types
- Discover Health Occupations Readiness Test: Life Science Overview
- Discover Health Occupations Readiness Test: Understanding Genetics
- Discover Health Occupations Readiness Test: Human Anatomy
- Discover Health Occupations Readiness Test: Energy in Physical Science
- Discover Health Occupations Readiness Test: Scientific Reasoning
- Discover Health Occupations Readiness Test Flashcards