Bond angles Flashcards
If there is 2 bonding electron pairs
180 degrees linear
Cl-Be-Cl
If there are 2 bonding pairs and 2 lone pairs of electrons
V shaped 104.5 H-O-H
if there are 3 bonded pairs of electrons
120 degrees trigonal plane
B with one F directly on top and two facing diagonal on the two bottom sides
IF there are 4 bonded pairs of electrons
Tetrahedral 109.5 degrees
If there are 5 bonded pairs of electrons
Trigonal bipyramid
90 and 120 degree angles
If there are 6 bonded pairs of electrons
Octahedral 90 degrees
Steps to find shape
find number of electron pairs
determine how many pairs are bonding and how many are lone
Bonding pairs indicate initial shape while lone pairs indicate any repulsion
For every lone pair electron present repulsion decreases by
reduced by 2.5 degrees