Transition Metals

• Where are transition metals found on the periodic table?

  The middle.
• How do the melting points, densities, strengths and hardness of transition metals compare to those of group 1 metals?

  Higher (transition metals)
• How does the reactivity of transition metals with oxygen, halogens and water compare to that of group 1 metals?


  Lower (transition metals)
• What are transition metals used for?

  Catalysts, alloys, magnets
• Give the distinctive properties of transition metal compounds.

  Form ions with different charges and coloured compounds.
• How big are nanoparticles?

  1-100 nanometers
• How are nanomaterials different from bulk materials?

  Higher surface area to volume ratio.
• What is the relationship between side length and surface-area-to- volume ratio?

  As side length decreases by a factor of ten, the surface area-volume ratio increases by a factor of 10
• What are nanoparticles used for?

  Used in healthcare, electronics, cosmetics and catalysts
• How big are fine particles?

  100-2500 nm
• How big are coarse particles?

  2.5 x 10 to the power of -6 to 1 x 10 to the power of -5
• Transition metal properties compared to group 1 properties

  transition:

  -more dense

  -harder

  -stronger

  -higher melting points

  -less reactive