Monthly Archives: April 2021

Types of Triangles — Learn about the different types of triangles. See examples and understand how triangles are classified by length of sides and angles.

Types of Triangles

This entry was posted on April 7, 2021 by Anne Helmenstine (updated on April 7, 2022)

Sources of Background Radiation — Learn about background radiation. Get the definition and find out about sources and risks associated with them.

What Is Background Radiation? Sources and Risks

This entry was posted on April 6, 2021 by Anne Helmenstine (updated on September 3, 2025)

Combined Gas Law in Chemistry — Learn about the combined gas law in chemistry. Get the definition, formula, and worked example problems. See how it applies to everyday life.

Combined Gas Law – Definition, Formula, Examples

This entry was posted on April 5, 2021 by Anne Helmenstine (updated on February 8, 2022)

Avogadro's Law — Learn about Avogadro's law for ideal gases. Get the definition and formula and see worked problem examples.

Avogadro’s Law – Definition, Formula, Examples

This entry was posted on April 4, 2021 by Anne Helmenstine (updated on June 6, 2026)

Binary Compounds — Learn about binary compounds in chemistry. Get the definition and examples. Learn about binary compound nomenclature.

What Is a Binary Compound? Definition and Examples

This entry was posted on April 3, 2021 by Anne Helmenstine (updated on October 12, 2021)

Gay-Lussac's Law — Learn about Gay-Lussac's law of gases, which is also known as Amonton's law. Get the definition, formula, and examples.

Gay-Lussac’s Law – Definition, Formula, Examples

This entry was posted on April 1, 2021 by Anne Helmenstine (updated on April 8, 2026)