"Rhodium is used in some of your products. What's that?" 

 Rhodium (Rh) has an atomic number of 45 and atomic weight of 102.9. It is a rare, silvery-white hard
  transition metal that is actually a member of the platinum group and is usually the most expensive 
  precious metal. 

Why do we use it then?
  • High reflectance

  • Extremely  hard and durable

  • Low and stable contact resistance and is highly resistant to corrosion

  • Low electrical resistance allows it to exhibit excellent properties as an electrical contact material