Daily Archives: June 11, 2015

Homemade Green Soap (kahvikis) — Soap in a tube? Why not! Typically when people make soap, they make a lot of it. However, you can make a small amount of soap in a test tube as a chemistry demonstration. This is a terrific example of the saponification reaction, plus it results in a product you can […]

Soap in a Tube Saponification Reaction

This entry was posted on June 11, 2015 by Anne Helmenstine (updated on November 29, 2017)

Oil and Water Don't Mix (Joanne Goldby) — Soap is good at cleaning because it acts as an emulsifier, enabling one liquid to disperse into another immiscible liquid. While oil (which attracts dirt) doesn’t naturally mix with water, soap can suspend oil/dirt in such a way that it can be removed. It’s easy to demonstrate the action of […]

Easy Emulsifier Chemistry Demonstration

This entry was posted on June 11, 2015 by Anne Helmenstine (updated on October 3, 2020)

Periodic Table Electron Configuration with Orbital Blocks — This periodic table contains each element’s atomic number, symbol, name, atomic weight and electron configuration. It is a periodic table showing shells of the outermost electron orbital. Each lightly colored cell highlights the block of the outermost electron. Block s elements are green, p is blue, d is pink and f block elements […]

Periodic Table Showing Shells

This entry was posted on June 11, 2015 by Todd Helmenstine