Chapter 9: Shape and Polarity of molecules Flashcards
According to the VSEPR, electrons
repel each other
valence electrons are found in
various domains
electron domain
lone pair or a bond at the central atom
the electron domain can be
single double or triple bond
lewis structure will tell you electron domain geometry and then
molecular geometry
2 domain, no lone pair equals
linear (mg and edg)
3 electron domains, no lone pair
trigonal planar (mg and edg)
4 domains, no lone pair
tetrahedral (edg and mg)
edg: 5 domains
trigonal bipyramid
edg: 6 domains
octahedral
3 domains and 1 lone pairs
bent mg
4 domains but 1 lone pairs
trigonal bipyramid mg
4 domains but 2 lone pairs
bent mg
dipole is pulled towards
higher en value element
electronegativity is a ______ and bond dipole moments are ___________
theory, measured
nonpolar give dipole what shape
symmetric
lone pairs affect molecular polarity strongly by
pulling electron density strongly
is there a lone pair on the central atom? yes? then its ______
polar
there is no lone pair on central atom and the atoms are bonded to the same atom
nonpolar
there is no lone pair on central atom and the atoms are not bonded to the same atom
polar because are different atoms which means there are different electronegativities
no net dipole movement means
nonpolar molecule
the arrows pulling away from each other means
nonpolar
net dipole movement means
a polar molecule
NH3
polar
H20
polar
HCl
polar
CO2
nonpolar
BeCl2
nonpolar
CS2
nonpolar
