Synopsis
Spec references J250: C2.1. This video provides an overview of how the masses of subatomic particles are used to calculate atomic masses. It then explains Relative Atomic Mass using chlorine isotopes as an example, followed by an introduction to formula masses, mole calculations, and percentage mass. The video concludes with discussions on the conservation of mass and atom economy. Given its fast pace, the content is likely better suited for revision rather than introducing these concepts.
The Supereme Sacrifice
Documentary telling the story of how the 1914 Heart of Midlothian football team became the 'C' Company of the 16th Battalion of The Royal Scots in World War I.
02: Into the Abyss | Royal Cousins at War
The roles played by cousins Tsar Nicholas II of Russia, Kaiser Wilhelm II of Germany and King George V of England in the desperate, frantic summer of 1914.