Bohr model Student activity Play

Bohr's atomic model Animation Play

Bohr's atomic model Whiteboard exercise Play

Bohr's atomic model Student activity Play

Calculating mass given the number of moles Student activity Play

Calculating surface area Animation Play

Calculating the area of a circle Whiteboard exercise Play

Calculating the diameter of the circle Whiteboard exercise Play

Calculating the radius Whiteboard exercise Play

Calculating the radius of the circle Whiteboard exercise Play

Calculating the radius, given the area Student activity Play

Calculating the volume of mercury Animation Play

Calculations involving the calculator Animation Play

Calculations involving π Animation Play

Central and inscribed angles Student activity Play

Central and inscribed angles on the same arc Whiteboard exercise Play

Centre of a circle at an arbitrary point Animation Play

Centre of enlargement Student activity Play

Centre of enlargement Whiteboard exercise Play

Change in the atomic radius across Period 3 Illustration Play

Change in the atomic radius across Period 3 Animation Play

Changes in atomic radius within a group of s-block elements Animation Play

Changes in electronegativity across Period 3 Animation Play

Changes in the atomic radius of s-block elements within the period Animation Play

Changes in the first ionisation energy across Period 3 Animation Play