Is this textbook answer missing any bits? OCR A ChemistryWatch
Answer: In an alkene, there are three bonding regions about the carbon atom. These repel each other equally resulting in a trigonal planar shape. In an alkane, there are four bonding pairs of electrons on the carbon atom. These repel each other equally resulting in a tetrahedral shape. The bond angle for a trigonal planar shape is 120(Degrees) while the bond angle for tetrahedral shapes are 109.5(Degrees).
- - - - - - - - - - - - - - -
It doesn't mention how rigid double bonds are to negate electronegativity. Is this all I need to mention, because I feel that it doesn't explain it fully?