Demonstration: this is a useful demonstration to introduce students to what they can expect to see in the diffusion cloud...

Practical Activity 14-16

The main and first evidence for the hollow atom came from Rutherford's alpha scattering experiment. However, the first...

Teaching Guidance 14-16

Solid carbon dioxide is known as dry ice. It sublimes at –78°C becoming an extremely cold gas. It is often used in theatres or...

Teaching Guidance 14-16