Click any element for its card — facts, shell diagram, a 3D atom you can spin, and (CAPE) orbitals. The other tabs give you a molar-mass calculator, an equation balancer with the CSEC reaction bank, an ion and formula builder, and the solubility rules and qualitative tests. "Stamp" downloads a PNG you can paste into notes; inside
Scribbler it drops straight onto your board. Link straight to an element:
/tools/periodic-table/?el=Na.