quiz #5 Flashcards
1
Q
what determines molecular polarity
A
shape and bond polarity
2
Q
when is molecule considered polar
A
net dipole or formal charge
3
Q
valance bond theory
A
a covalent bond forms when orbitals of two atoms overlap and the overlap region (between the nuclei) is occupied by a pair of electrons
- opposing spins of electron pair
- maximum overlap of bonding pairs (stronger)
result: hybridization of atomic orbitals
4
Q
sp hybridization
A
linear molecules
5
Q
sp2 hybridization
A
trigonal planar molecules
6
Q
sp3 hybridization
A
tetrahedral molecules
7
Q
single bonds
A
- sigma bond
- end to end overlap
8
Q
double bonds
A
- sigma + pi bond
- pi bond formed by overlap of p orbitals
- side to side overlap
9
Q
triple bonds
A
- sigma + 2 pi bonds
10
Q
sigma bond
A
allows free rotation
11
Q
pi bond
A
restricts rotation
