Question 1

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons from a metal to a nonmetal, while covalent bonds involve the sharing of electrons between two nonmetals.

Question 2

Which of the following compounds contains both ionic and covalent bonds?

Accepted Answer

NH4NO3

Question 3

Which of the following ions is isoelectronic with neon (Ne)?

Accepted Answer

Na+

Question 4

Which of the following best explains why MgO has a much higher lattice energy than NaCl?

Accepted Answer

MgO has ions with higher charges, which increases the lattice energy according to $$F \propto \frac{Q_1$ Q_2$}{d^2$}.$$

Question 5

Which of the following molecules is nonpolar, despite having polar bonds?

Accepted Answer

CO2

Question 6

What is the correct formula for calcium phosphate?

Accepted Answer

Ca3(PO4)2

Question 7

Which of the following best describes the molecular geometry of SF4?

Accepted Answer

Trigonal bipyramidal (seesaw)

Question 8

Which of the following statements about resonance structures is correct?

Accepted Answer

Resonance structures differ only in the arrangement of electrons.

Question 9

Which of the following molecules would you expect to have the largest dipole moment?

Accepted Answer

H2O

Question 10

Which of the following is the correct name for FeCl3?

Accepted Answer

Iron(III) chloride

Question 11

Which of the following best explains why water (H2O) has a higher boiling point than hydrogen sulfide (H2S)?

Accepted Answer

Water has stronger hydrogen bonding due to the presence of O–H bonds.

Question 12

Which of the following is the correct Lewis dot symbol for the sulfide ion (S2–)?

Accepted Answer

S with 8 dots and a 2– charge

Question 13

Which of the following molecules has a bond angle closest to $$109.5^\circ$$?

Accepted Answer

NH3

Question 14

Which of the following is the correct systematic name for $$H_2SO_4$$?

Accepted Answer

Sulfuric acid

Question 15

Which of the following best describes the trend in lattice energy for the compounds LiF, NaF, and KF?

Accepted Answer

Lattice energy decreases as the size of the cation increases.

Question 16

Which of the following is the correct formula for dinitrogen pentoxide?

Accepted Answer

N2O5

Question 17

Which of the following molecules is expected to be polar?

Accepted Answer

NH3

Question 18

Which of the following best explains why the carbonate ion ($$CO_3$$^{2-}$$) exhibits resonance?

Accepted Answer

The ion contains three identical C–O bonds that can be represented by different Lewis structures.

Question 19

Which of the following intermolecular forces is the strongest?

Accepted Answer

Ion-ion interactions

Question 20

Which of the following best describes the electron-domain geometry and molecular geometry of $$ICl_4$$^-$$?

Accepted Answer

Electron-domain geometry: octahedral; Molecular geometry: square planar

Chemical Bonding and Molecular Geometry: Study Notes

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