Joey Hajda

Welcome to Friendly Chemistry

Welcome to Friendly Chemistry Lessons on!

How to Use This Course

Joey Hajda, a homeschool parent of ten and 25-year teacher in public schools, community college, and homeschool, presents Friendly Chemistry to educate and share the enthusiasm for science that he and his wife share. Their Friendly Chemistry curriculum, as shared with your students through, will build a solid foundation for more advanced chemistry classes, if your student continues their study of chemistry, and allows your student to earn the equivalent of one-half credit on a high school science course, while presenting chemistry in a way that is not hard or intimidating. There are 12 lessons in this course, containing teaching tips, a section of text, a group of activities, laboratory experiences, videos, and worksheet pages. Each lesson also has a test included. Your student will study the elements, atoms, electrons, and ions. They will be introduced to determining charges on ions and to quantum mechanics. Answer keys for worksheets and tests are included on one download listed at the end of the lessons. Students who complete the 12-week study may earn 0.5 science credit. As always, please check your own state’s academic requirements.

Course Details

Course Introduction

Welcome to your Friendly Chemistry course! We’re very glad you’ve chosen to use Friendly Chemistry to help your child learn basic chemistry. Traditionally, chemistry courses are thought to be “hard” and intimidating. We think you’ll find that learning chemistry with this guide to be just the opposite.

Our goal in this course is to provide a means of building a solid foundation of knowledge about chemistry. Should your students or children choose to continue their study, you can be confident that they’ll have the “basics” to meet the challenges of an advanced chemistry course.

Let’s begin with an overview of the course. The course is divided into 12 lessons. Within each lesson there is a section of text followed by group activities, laboratory experiences, and worksheet-type practice pages. Each lesson culminates in a lesson test.

In addition, there are video segments corresponding to each lesson. We suggest you view each video as you follow along with the text portion of each lesson.


Text-based lessons; weekly videos related to the topic; practice pages, quizzes, and tests (answer keys provided)


12 weekly lessons


High school

Course Outline

  • Course Introduction
  • Lesson 1 – Meet Chemistry
  • Lesson 2 – Moving in a Little Closer
  • Lesson 3 – Electron Arrangement
  • Lesson 4 – Applying Quantum Mechanics
  • Lesson 5 – Orbital Notation
  • Lesson 6 – Electronic Configuration Notation
  • Lesson 7 – Electron Dot Notation
  • Lesson 8 – Relating Electron Arrangement to Reactivity
  • Lesson 9 – Ionization Energy
  • Lesson 10 – Atom Size
  • Lesson 11 – Ion Formation
  • Lesson 12 – Determining Charges on Ions and ANSWER KEY (L. 1-12)

For a printable course outline, click here.

Transcript Information

This course counts as a science credit. Students who complete the 12-week study may earn 0.5 academic credit.

*Please be informed of your state’s academic requirements.

For transcript help, go to

Course Completion Certificates

Go to all Friendly Chemistry lessons.

Find other great science resources in our Focused Learning Centers.


Joey Hajda has had a love of science since he was a boy. His initial career choice was veterinary medicine, but after receiving his veterinary degree, he discovered that he loved teaching as much as he loved science. Consequently, he got a degree in education. His teaching career has now spanned almost 25 years and has included public school, community college, and homeschooled students—including his own ten children. He and his wife, Lisa, in addition to homeschooling their children, wrote Friendly Chemistry: A Guide to Learning Basic Chemistry. They enjoy sharing their enthusiasm for science with fellow homeschoolers.

For additional information regarding Friendly Chemistry, please visit or find us on Facebook.

*Please note that Friendly Chemistry’s copyright policy strictly prohibits making photocopies by any means of any portions of the student book or teacher’s guide other than photocopies of the test masters. Please email or call if you have questions regarding our copyright policy.

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