Recognising reducing agents Student activity Play

Relationship between the group number and the number of valence electrons Animation Play

Replacing soil minerals Student activity Play

Respiration Student activity Play

Resting and action potentials of a neurone Student activity Play

Role of cations in plant cells Slideshow Play

Role of macro-elements absorbed as cations Student activity Play

s-block elements Animation Play

Salt hydrolysis Student activity Play

Salts in the human organism Illustration Play

Salts of carboxylic acids Student activity Play

Salts of s-block elements occurring in nature Slideshow Play

Salts of weak acids and strong bases Student activity Play

Salts of weak acids and strong bases Whiteboard exercise Play

Salts of weak acids and weak bases Student activity Play

Salts of weak acids and weak bases Animation Play

Seawater Slideshow Play

Sentences about reactions of metals with acids Whiteboard exercise Play

Skin irritation Animation Play

Sodium hydroxide Animation Play

Sodium hydroxide Animation Play

Soil Student activity Play

Soil as a source of minerals Student activity Play

Solubility curve for calcium hydroxide Whiteboard exercise Play

Solubility of hydroxides Whiteboard exercise Play