Chemistry Notes

Learn chemistry. Here you will find a collection of chemistry notes, projects, worksheets, and labs.

Freezing Point Depression — Get the freezing point depression formula and definition. See how you calculate it and get examples in everyday life.

Freezing Point Depression Formula and Definition Recently updated !

This entry was posted on October 16, 2021 by Anne Helmenstine (updated on October 18, 2021)

Net Ionic Equation and Complete Ionic Equation — Learn about ionic equations. See the difference and examples of the molecular, complete, and net ionic equation.

Net Ionic Equation and Complete Ionic Equation Recently updated !

This entry was posted on October 13, 2021 by Anne Helmenstine (updated on October 18, 2021)

Naming Ionic Compounds — Learn the rules for naming ionic compounds and get examples of binary compound and polyatomic compound names.

Naming Ionic Compounds – Nomenclature Rules Recently updated !

This entry was posted on October 12, 2021 by Anne Helmenstine (updated on October 18, 2021)

What Is a Chemical Equation — Learn what a chemical equation is and how to write one properly. See the parts of the equation and understand what they mean.

What Is a Chemical Equation? Definition and Examples

This entry was posted on October 7, 2021 by Anne Helmenstine (updated on October 13, 2021)

What Is pKa in Chemistry — Get the definition of pKa in chemistry and understand how it relates to the acid dissociation constant Ka and the strength of acids.

What Is pKa in Chemistry? Acid Dissociation Constant

This entry was posted on October 5, 2021 by Anne Helmenstine (updated on October 8, 2021)

Periodic Table Flash Cards — These periodic table flash cards have essential facts for all 118 elements. The PDF is free and easy to print.

Periodic Table Flash Cards – Free Printable PDF Element Facts

This entry was posted on September 22, 2021 by Anne Helmenstine (updated on September 27, 2021)

What Is an Exact Number - Definition and Examples — Learn what an exact number is in chemistry, physics, and math. Get the definition and examples of exact numbers.

What Is an Exact Number? Definition and Examples

This entry was posted on September 19, 2021 by Anne Helmenstine (updated on September 20, 2021)

Regelation of Ice — Learn about the regelation of ice in physics and chemistry. Get the definition and examples of regelation in daily life.

Regelation of Ice in Physics and Chemistry

This entry was posted on September 18, 2021 by Anne Helmenstine (updated on October 6, 2021)

Disaccharide Examples — Get disaccharide examples and structures. Learn what a disaccharide is and explore their chemical bonds and uses.

Disaccharide Examples – What Is a Disaccharide?

This entry was posted on September 4, 2021 by Anne Helmenstine (updated on September 6, 2021)