Colour By Design(CD)

Question 1

Why are some substances/objects coloured and others colourless?

Answer 1

• Colourless objects=When light shines through a substances,no wavelengths of incident light are absorbed?they are all transmitted
• Coloured=Wavelengths corresponding to particular colours are absorbed by substances in the object

Question 2

What factors affect the colour of compounds?

Answer 2

• The number of delocalised electrons=smaller energy gap
• Smaller energy gaps results in the absorption of longer wavelengths