Bond Type and Strength
Lewis Structures
Shapes, Angles, and Hybridization
Polarity
IMFs
100
Would the bond between Li and Cl be ionic or covalent?
Ionic, Li is a metal and Cl is a nonmetal
100
Draw the complete lewis structure of: CH4
100
What is the shape of a molecule where the central atom has four bonding areas and no lone pair electrons?
Tetrahedral
100
Would the bond in O2 be polar or nonpolar?
Nonpolar (electronegativity difference would be 0!)
100
List all the intermolecular forces between two O2 molecules.
London Dispersion forces only (O2 is nonpolar)
200
What kind of bond would form between S and F?
Covalent, both S and F are nonmetals
200
Draw the complete lewis structure of: NH3
200
What are the bond angles for a tetrahedral molecule?
109.5
200
Is the H2O molecule polar or nonpolar?
polar (2 lone pairs on central atom = bent)
200
List all the IMFs between two H2O molecules.
London Dispersion, Dipole-Dipole, and Hydrogen Bonding
300
Which of the following has the stronger ionic bond and why?
KCl or MgO
MgO because Mg has a larger charge than K and O has a larger charge than Cl
300
Draw the complete lewis structure of: HCN
300
What are the bond angles for a trigonal pyramidal molecule?
107.5
300
Is CH4 a polar or nonpolar molecule?
nonpolar (no lone pairs on C and surrounded by all the same atom)
300
Which molecule would have the higher boiling point and why: NH3 or CH4?
NH3 because it is polar and has D-D forces and H-Bonding, while CH4 is nonpolar and only has weaker LDF between its molecules
400
Which of the following has the stronger ionic bond and why?
MgCl2 or MgO
MgO because although they both have Mg as the cation, the O has a larger charge than the Cl.
400
Draw the complete lewis structure (including any resonance) of: CO32-
400
What is the hybridization of the central atom in H2O?
sp3
400
Is SF5- a polar or nonpolar molecule?
polar (lone pair on S)
400
Which has stronger IMFs and why: Cl2 or Br2?
Br2 because it has more electrons than Cl2 and is therefore more polarizable. Both molecules are nonpolar and only have LDF, but the more polarizable the atom, the stronger the LDF.
500
Which of the following has the stronger ionic bond and why?
KCl or LiCl
LiCl because since charges are the same, we look at ion size. They both have Cl, but Li is smaller than K, therefore the ions in LiCl are closer together and harder to pull apart.
500
Draw the complete lewis structure (including any resonance) of: NO3-

AND calculate the formal charges of all atoms in one of the structures.
500
What is the hybridization of the central atom in any trigonal planar molecule?
sp2
500
Is ICl2 a polar or nonpolar molecule?
Nonpolar. All three lone pairs on I would be in the equatorial positions, while the Cl atoms would be axial and 180 degrees from eachother, making a linear shape overall.
500
You have two sealed jars. One has liquid Br2 and the other has liquid H2O. Which jar would you expect to have more molecules in the gaseous state after 10 minutes and why?
Br2 because it only has LDF (nonpolar molecules). H2O has stronger hydrogen bonding so the molecules will be more likely to remain in the liquid form.
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