Hands-On Chemistry: Building Atomic Models with Printable Element Cards

3. Atomic Models: Rutherford & Bohr | Introduction to Solid State Chemistry | Materials Science and Engineering | MIT OpenCourseWare

Five Things to Know about NASA's Deep Space Atomic Clock - NASA

NIST Launches a New U.S. Time Standard: NIST-F2 Atomic Clock

Deep Space Atomic Clock -- Navigation Breakthrough

Atom | Definition, Structure & Examples

The Structure of an Atom: Parts, Diagram, Examples

Structure of an Atoms