The molar mass Student activity Play

The perimeter of the triangle and the diameter of the big circle Animation Play

The physical properties of the s-block metals (1) Student activity Play

The physical properties of the s-block metals (2) Student activity Play

The radius of an orbit and the size of the atomic nucleus The radius of an orbit and the size of the atomic nucleus Whiteboard exercise Play

The relationship between atomic structure and the position of elements in periods Whiteboard exercise Play

The relationship between atomic structure and the position of elements in periods Student activity Play

The relative atomic mass Animation Play

The relative atomic mass and its units Whiteboard exercise Play

The relative atomic mass of a natural element Animation Play

The relative atomic mass of an element Whiteboard exercise Play

The Rutherford model of the atom Student activity Play

The spectral lines in the atomic spectrum of hydrogen Animation Play

The structure of atomic nucleus Class activity Play

The structure of atomic nucleus Whiteboard presentation Play

The structure of Group 2 elements and their physical properties Animation Play

The structure of the atom Class activity Play

The structure of the atom Whiteboard presentation Play

The structure of the atom Class activity Play

The structure of the atom Whiteboard presentation Play

The structure of the periodic table Whiteboard exercise Play

The structure of the periodic table Student activity Play

The trend in the reactivity of the elements in Group 17 Animation Play

The trends in the properties of the elements in Period 3 Whiteboard presentation Play

The trends in the properties of the elements in Period 3 Class activity Play