Trends in periodic table

• Polar unequal sharing of e


  One end slightly neg, one end slightly pos
• Trends in Periodic Table
• Groups in the Periodic Table

  • Metals
  • Close Transition metals
  • Non metals (gain e-)
• Increasing nuclear charge


  Decreasing atomic radius
• Increasing nuclear charge


  Decreasing screening
• Increasing nuclear charge


  Increasing ionisation energy
• Increasing nuclear charge


  Decreasing metallic character
• Order of stability


  • Full lever
  • Full sublevel (S,P,d,f)
  • Half filled sublevel (p³,d³ etc.)
• Increasing group number


  Decreasing atomic radius
• Increasing group number


  Decreasing screening
• Increasing group number


  Decreasing ionisation energy
• Increasing group number


  Increasing reactivity
• Groups in the Periodic Table


  • Alkali metals
  • Alkaline earth metals
  • Transition metals
  • Non metals
  • Halogens
  • Noble gases
• Exceptions to ionisation energy trends
• Atomic Radius


  Half the distance between the nuclei of 2 atoms of the same element joined by a single covalent bond
• 1st Ionisation Energy


  The energy required to remove the most loosely bound electron from an atom in its ground state
• 2nd Ionisation Energy


  The energy required to remove the 2nd most loosely bound electron from a positive ion
• Electronegativity


  The relative force of attraction which an atom has for the shared pair of electrons in a covalent bond
• Increasing electronegativity


  Higher stability and reactivity