Spectrum of helium Illustration Play

Spectrum of hydrogen Student activity Play

Spectrum of hydrogen Whiteboard exercise Play

Spontaneous and induced point mutations Animation Play

Spontaneous and stimulated emission Whiteboard exercise Play

Spontaneous and stimulated emission Student activity Play

Spontaneous changes Animation Play

Spontaneous changes and probability Student activity Play

Spontaneous emission Animation Play

Stability of the nuclei Whiteboard presentation Play

Stability of the nuclei Class activity Play

Stages in the development of a new plant variety Whiteboard exercise Play

Standard enthalpy change for hydrogenation of ethene Animation Play

Standard enthalpy change. Hess’s law Class activity Play

Standard enthalpy change. Hess’s law Whiteboard presentation Play

Standard enthalpy of atomisation Student activity Play

Standard enthalpy of atomisation of non-metals Animation Play

Standard enthalpy of combustion Whiteboard exercise Play

Standard enthalpy of combustion Student activity Play

Standard enthalpy of formation of ammonia Animation Play

Standard free energy change for neutralisation reaction Animation Play

Standard reduction potentials Student activity Play

Stars Student activity Play

Stars Whiteboard exercise Play

Statements about assimilation of food Whiteboard exercise Play