Flower of Life - Wikipedia, the free encyclopedia --- and other geometric figures (note: read through ahead of time, go through and digest information to share with young ones; sit along-side older ones to discuss potential sensibility issues)
Stable atoms have as many electrons as they do protons. How do these electrons orient themselves around the nucleus? They fill their electron orbitals by the aufbau principle.: The Aufbau Principle - Using the Aufbau Principle
A nuclear meltdown is an informal term for a severe nuclear reactor accident that results in core damage from overheating. The term is not officially defined by the International Atomic Energy Agency or by the Nuclear Regulatory Commission.
Just how small is an atom? - Best atom video I have ever seen! This fast-paced animation uses spectacular metaphors (imagine a blueberry the size of a football stadium!) to give a visceral sense of the building blocks that make our world.