Chemistry Notes

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

Are Two Atoms of the Same Element Identical — Learn whether two atoms of the same element are identical and see how they can vary. Discover how to identify an atom.

Are Two Atoms of the Same Element Identical?

This entry was posted on September 6, 2023 by Anne Helmenstine (updated on September 16, 2023)

What Is a Chemical Reaction — Learn what a chemical reaction is in chemistry. Get the chemical reaction definition and examples and learn how to recognize one.

What Is a Chemical Reaction? Definition and Examples

This entry was posted on August 26, 2023 by Anne Helmenstine (updated on September 5, 2023)

Condensation Reaction Definition — Get the condensation reaction definition and examples in chemistry. Learn about dehydration reactions and related synthesis reactions.

Condensation Reaction Definition and Examples

This entry was posted on July 22, 2023 by Anne Helmenstine (updated on July 30, 2023)

Octet Rule — Learn about the octet rule in chemistry. Get the definition, see examples, and learn about exceptions to the rule.

Octet Rule Definition, Examples, and Exceptions

This entry was posted on June 18, 2023 by Anne Helmenstine (updated on June 27, 2023)

Covalent Bond Definition and Example — Get the covalent bond definition and examples in chemistry. Learn about the different types of covalent bonds and which elements participate.

Covalent Bond Definition and Examples

This entry was posted on June 13, 2023 by Anne Helmenstine (updated on June 22, 2023)

Henderson Hasselbalch Equation — Get the Henderson Hasselbalch equation and examples showing how to use it to calculate the pH of weak acids or weak bases.

Henderson Hasselbalch Equation and Examples

This entry was posted on March 25, 2023 by Anne Helmenstine (updated on September 13, 2023)

Hund's Rule Definition and Example — Get the Hund's rule definition and examples in chemistry and learn how it relates to the Aufbau principle and Pauli exclusion principle.

Hund’s Rule Definition and Examples

This entry was posted on March 16, 2023 by Anne Helmenstine (updated on March 20, 2023)

Volatile Definition in Chemistry — Get the volatile definition in chemistry. See examples of volatile substances and learn about how volatility works and its uses.

Volatility – Volatile Definition in Chemistry

This entry was posted on March 12, 2023 by Anne Helmenstine (updated on March 14, 2023)

What Is an Acid in Chemistry — Learn what an acid is in chemistry. Get the acid definition and examples and learn about the properties of these compounds.

What Is an Acid in Chemistry? Definition and Examples

This entry was posted on February 14, 2023 by Anne Helmenstine (updated on February 20, 2023)