Radioactivity – time relationship Illustration Play

Radiocarbon dating Whiteboard exercise Play

Radiocarbon dating Student activity Play

Radiocarbon dating Simulation Play

Radioiodine therapy Slideshow Play

Radon concentration Slideshow Play

Rate of radioactive decay Animation Play

Recording a proton NMR spectrum Student activity Play

Recording proton NMR spectrum of propanone Animation Play

Relative abundance of isotopes and mass spectra Student activity Play

Relative atomic mass Class activity Play

Relative atomic mass Whiteboard presentation Play

Relative atomic mass and relative molecular mass Student activity Play

Relative atomic mass and relative molecular mass Animation Play

Relative atomic mass and relative molecular mass Whiteboard exercise Play

Relative atomic mass of magnesium Whiteboard exercise Play

Relative atomic masses of isotopes Chart Play

Rutherford's experiment Animation Play

Scintigraphy Slideshow Play

Scintillation counter Whiteboard exercise Play

Scintillation counter Student activity Play

Smoke detector Animation Play

Smoke detector Whiteboard exercise Play

Smoke detector Student activity Play

Sources of radiation Student activity Play