Diffusion Through a Membrane

Diffusion is the net movement of particles (atoms, molecules, or ions) from a highly concentrated region to a region of low concentration. Understanding diffusion through a membrane is a key biology concept. Take this interactive tour to help you master the process and terminology. Continue reading

Electron Orbitals

Electron configuration in an atom is organized into orbitals and differently shaped subshells. Learn about the s subshell, p subshell, d subshell, and f subshell (and more) in this interactive tour. Continue reading