Everything in the body is built from a few dozen elements, and each element is defined by one number: how many protons it carries. Pick an element and watch its atom assemble — nucleus in the center, electrons whirling in shells.
Hydrogen
proton (+)neutronelectron (−)
Hydrogenthe simplest atom
Pick an element (the ones life is built from)
📷 Reference image
A real labeled figure to compare with the interactive above.
Build an Atom — OpenStax, CC BY 3.0 (via Wikimedia Commons)
