COVALENT BONDING

Beschreibung

Mindmap am COVALENT BONDING, erstellt von CrazyFreeMind am 11/01/2015.
CrazyFreeMind
Mindmap von CrazyFreeMind, aktualisiert more than 1 year ago
CrazyFreeMind
Erstellt von CrazyFreeMind vor fast 10 Jahre
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Zusammenfassung der Ressource

COVALENT BONDING
  1. bond length: single < double < triple
    1. bond strength: single < double < triple
      1. use VSEPR to predict the shapes of molecules
        1. pairs of valence electrons repel each other and will take up positions to minimise these repulsions
          1. lone pairs repel more than bonding pairs
          2. giant covalent compounds
            1. have high melting points because covalent bonds are broken when melting
              1. Examples
                1. silicon
                  1. SiO2
                    1. diamond
                      1. graphite
                    2. covalent molecular compounds
                      1. non-polar molecules
                        1. polar molecules
                          1. difference in electronegativity: electrons lie more towards one atom than another
                            1. shape of molecules: if the dipole moments of individual bonds cancel, the molecule is not polar
                            2. only intermolecular forces are broken when melting
                              1. Van der Waals forces caused by instantaneous and induced dipoles
                                1. dipole-dipole forces
                                  1. hydrogen bonds
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