Questions

What makes a substance acidic or basic? How does the Brønsted–Lowry definition improve on the Arrhenius model?

When two substances react, bonds are broken and new ones form. What drives this process, and how do activation energy and catalysts fit in?

Iron corrodes readily in air and water while gold stays shiny for thousands of years. What is different about their chemistry?

What is the step-by-step process by which a cell copies its DNA before dividing? Which enzymes are involved?