Pythagorean triple Animation Play

Pythagorean triples Student activity Play

Pythagorean triples Whiteboard exercise Play

Qualitative qualities and quantitative qualities Whiteboard exercise Play

Radioactive decay Student activity Play

Radioactive decay Student activity Play

Radioactive isotopes Animation Play

Radioactivity Student activity Play

Random sampling Animation Play

Random sampling, qualitative qualities Student activity Play

Reaction of sodium, magnesium and aluminium with water Animation Play

Reactions between halogens and metals Student activity Play

Reactions between Period 3 elements and water (1) Student activity Play

Reactions with water Student activity Play

Reactivity of alkali metals Student activity Play

Reactivity of halogens Student activity Play

Reactivity of the alkali metals and their position in the periodic table Animation Play

Reactivity of the alkaline-earth-metals and their electron configurations Animation Play

Read and compare Student activity Play

Reading from graphs Student activity Play

Reading the information included in the periodic table Whiteboard exercise Play

Reduction formulas due to periodicity Student activity Play

Reduction formulas due to periodicity Whiteboard exercise Play

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

Relative atomic mass Whiteboard presentation Play