Properties of transition metals

• Give two reasons why quarrying is bad for the environment.

  Visual pollution

  Noise pollution
• Why is copper used for electrical wiring?

  Good conductor of electricity
• Why is iron used for girders in buildings?

  Strong
• State why transition metal oxides are added to pottery glazes.

  Colour
• What happens to the melting point of group 1 metals going down the group?

  Decrease
• Which gas in the table should be used in a filament lamp?

  Argon as it is unreactive
•  What is the name of one metal in the word box which often has coloured compounds?

  Copper
• A small piece of sodium is added to some water containing Universal Indicator solution. Describe what you would see happening

  Universal indicator turns purple

  Sodium has a yellow flame and effervescence
• Francium is the most reactive element in Group 1. Explain why in terms of electronic structure

  As outer shell becomes further to positive nucleus electrons become less attract to the nucleus meaning it is easily lost
• Suggest two properties of transition metals that make them suitable for making cutting tools.

  High melting point

  Strong
• State one property that makes aluminium more suitable than copper for overhead cables

  Aluminium has low density
• Copper can be extracted from solutions of copper salts by adding iron. Explain why.

  Iron is more reactive so copper is displaced
• Explain why metals such as nickel and platinum are good conductors of electricity.

  Electrons can move