PERFECT IONIC MODEL

• WHAT IS THE OPPOSITE OF THE PERFECT IONIC MODEL?

  covalent character
• WHAT MUST A MODEL HAVE TO HAVE COVALENT CHARACTER?

  • larger charge on positive ion
  • greater attraction with negative ion('s electrons)
  • more sharing
  • covalent character
• WHEN DO IONS BECOME DISTORTED?

  • positive ion is small and highly charged
  • negative ion is large and highly charged
• WHAT LEADS TO COVALENT CHARACTER/ NOT A PERFECT IONIC MODEL?

  distortion of ions (not spherical)
• HOW TO TELL IF A COMPOUND HAS COVALENT CHARACTER?

  experimental value and theoretical value have a large difference
• WHAT VALUE IS CALCUALTED USING A BORN-HABER CYCLE?

  experimental
• WHAT IS THE DIFFERENCE BETWEEN PERFECTLY IONIC COMPOUNDS AND COMPOUNDS WITH COVALENT CHARACTER?

  compounds with more covalent character are less soluble/ insoluble in water