when comparing the molecular geometries tetrahedral, pyramidal, and bent, all have the same number of electron domains, but the bond angles are all different (109.5, 107.5, and 105 respectively). explain why this is the case. question 3 options: different atoms exhibit different angles. all types of tetrahedral bonds have four bonded electron pairs around them; the angle changes based on the electronegativity of the central atom. trigonal pyramidal represents three electron groups around the central atom and tetrahedral represents four electron groups around the central atom which accounts for the slight difference in bond angles. since each case represents four groups around the central atom, the bond angles differ depending on what type of electrons (bonded or non-bonded) exist within the compound. when four groups of bonded electrons exist the angle is slightly different than when three groups of bonded electrons and one group of non-bonded electrons exists. two groups of bonded electrons and two groups of non-bonded electrons also differ slightly in bond angle from either of the previous examples. this has to do with vsper theory and enhanced repulsion.