Understand the true nature of acidity. We explain why $\text{H}^+$ is the acid, the reality of the hydronium ion ($\text{H}_3\text{O}^+$), and the calculation of pH.
Platinum is brilliant, but why? We explore the density and chemical inertness that define its unique high luster and how wear creates its famous patina.
Visual guide to bee identification. Learn how hairiness, body shape, and leg structures distinguish different species and separate them from wasps and flies.
Define the differences between compounds and mixtures. We classify milk, explaining its complex identity as a heterogeneous blend of solutions and colloids.