Structure & bonding

• What is the general formula for alkenes?

  CnH2n
• What types of bonds are present in a double bond of alkenes?

  One sigma bond and one pi bond
• What geometry is associated with the double-bonded carbon atoms in alkenes?

  Trigonal planar geometry
• What causes the trigonal planar geometry in alkenes?

  Due to sp2 hybridization of carbon atoms
• How does sp2 hybridization contribute to the formation of the pi bond in alkenes?

  It allows efficient overlap of p orbitals