Arrangement of the elements in the periodic table Whiteboard exercise Play

Atomic mass of an element Student activity Play

Atomic mass of an element Animation Play

Atomic masses in the periodic table Student activity Play

Atomic number Student activity Play

Atomic number and mass number Student activity Play

Atomic radii of the s-block elements Student activity Play

Atomic radius Student activity Play

Atomic spectra Whiteboard presentation Play

Atomic spectra Class activity Play

Atomic spectrum of hydrogen Student activity Play

Avogadro's number Student activity Play

Basic periods of trigonometric functions Student activity Play

Beats Student activity Play

Beats Animation Play

Bohr model Student activity Play

Bohr model Whiteboard exercise Play

Bohr's atomic model Whiteboard exercise Play

Bohr's atomic model Student activity Play

Bohr's atomic model Animation Play

Bohr's model of the atom Animation Play

Caenorhabditis elegans – a model organism Animation Play

Calculating mass given the number of moles Student activity Play

Calculating the mass of product formed Student activity Play

Capacity of a car's fuel tank Animation Play