Transition elements: Atomic structure and the periodic table: Chemistry: GCSE (9:1)

• Transition elements are found

  In the middle block of the periodic tableRe

  
• Physical properties of transition elements

  Hard, high melthing points, strong and dense.
• Chemical properties of transition elements

  Slow/no reaction with oxygen, water and halogens
• Charges on transition metal ions

  Form positive ions often with the ability to form more than one ion

  
• Iron ions


  Fe2+, Fe3+
• Catalyst


  A substance that speeds up the rate of a chemical reaction without being used up
• Transition metals are good catalysts because


  They form more than one ion
• Iron catalyses


  The haber process
• Colours of transition metal compounds

  Coloured solids and solutions

  
• Reactivity of transition elements

  Less reactive than group 1+2 metals
• Corrosion


  The gradual wearing away of a metal element due to a chemical reaction
• Rust


  The corrosion of iron