Atom

Nomor Atom dan Nomor Massa

Sumber: https://belajar.kemdikbud.go.id/SumberBelajar/tampilajar.materi

Membangun Atom

Sumber : https://phet.colorado.edu/en/simulation/build-an-atom

Isotop

Sumber: https://phet.colorado.edu/en/simulation/isotopes-and-atomic-mass