Week 6 - Theories of Covalent Bonding I

Question 1

A covalent bond forms when…

Answer 1

orbitals of two atoms overlap and a pair of electrons occupy the overlap region

Question 2

single bond =

Answer 2

1 sigma bond

Question 3

double bond =

Answer 3

1 sigma bond + 2 pi bonds

Question 4

Can valence bond theory predict bond angles?

Answer 4

Not for all molecules

Question 5

What can Valence Bond Theory vs VSEPR theory predict?

Answer 5

VBT - can predict orbitals involved but cannot predict the geometry for all molecules
VSEPR - can predict geometry for molecules but not the orbitals involved in bonding

Question 6

if you mix two valence orbitals, you get…

Answer 6

two equivalent (atomic hybrid) orbitals - and so on

Question 7

number of electron groups =

Answer 7

= number of hybrid orbitals

Question 8

Triple bond =

Answer 8

2 sigma bonds + 2 pi bonds

Question 9

say you’re mixing 1 s orbital, 3 p orbitals, and 2 d orbitals; what is the hybrid bond called?

Answer 9

s p^3 d^2 σ bond