Atomic World Lesson 14: The “Lanthanide” series (also called the “rare earth” elements)ellenj2024-11-03T19:56:30-05:00 Please sign up for the course before starting the lesson. Atomic World Lesson 13: Transition metals, true metals, and electron orbitals Atomic World Lesson 15: The radioactive elements Back to: Exploring the Atomic World
