Question 1

Which of the following elements will possess the most valence electrons?

Accepted Answer

Si

Question 2

Which of the following species has bonds with the most ionic character?

Accepted Answer

NaCl

Question 3

Which of the following is NOT a physical property attributed to metallic bonding?

Accepted Answer

Brittleness

Question 4

Calculate the difference in electronegativity values between carbon and fluorine using the Pauling scale ($EN_{F} = 4.0$, $EN_{C} = 2.5$).

Accepted Answer

$1.5$

Question 5

Which of the following bonds is the most polar?

Accepted Answer

C–F

Question 6

How many shared electrons are around the oxygen atom in a water molecule ($H_2O$)?

Accepted Answer

$4$

Question 7

How many octet electrons are around the phosphorus atom in the following compound: $\ce{PH4+}$?

Accepted Answer

$8$

Question 8

Determine the formal charge of the nitrogen atom found within the ammonia molecule, $NH_3$.

Accepted Answer

$0$

Question 9

Which element within the thiocyanate ion ($NCS^-$) possesses a negative charge?

Accepted Answer

N

Question 10

How many lone pairs does the sulfur atom possess in the hydrogen sulfide molecule ($H_2S$)?

Accepted Answer

$2$

Question 11

Which of the following statements best describes the relationship between bond length and bond strength in a series of compounds including bonds between the same two atoms?

Accepted Answer

The greater the bond length, the weaker the bond.

Question 12

What is the average charge of the oxygen atoms within the phosphate ion, $PO_4^{3-}$, given that there are four resonance structures and the overall charge is $-3$?

Accepted Answer

$-0.75$

Question 13

What is the average bond order of the sulfur-oxygen bonds within the sulfate ion ($SO_4^{2-}$) if there are four resonance structures and six S–O bonds in total?

Accepted Answer

$1.5$

Question 14

Which compound possesses the strongest ionic bond: $MgF_2$ or $KCl$?

Accepted Answer

$MgF_2$

Question 15

Choose the compound below that should have the highest melting point according to the ionic bonding model.

Accepted Answer

AlN

Question 16

When setting up the steps of the Born-Haber Cycle for $K_2O$, how many ionization energies (IE) and how many electron affinities (EA) are required?

Accepted Answer

2 IE, 1 EA

Question 17

Which of the following best describes the force of attraction between two charged particles according to Coulomb's Law?

Accepted Answer

$F = \frac{kQ_1Q_2}{r^2}$

Question 18

Which of the following molecules is most likely to have an incomplete octet?

Accepted Answer

$BF_3$

Question 19

Which of the following statements is true regarding resonance structures?

Accepted Answer

Resonance structures differ only in the arrangement of electrons, not atoms.

Question 20

Which of the following best describes the role of lone pairs in Lewis Dot Structures?

Accepted Answer

Lone pairs are nonbonding electrons localized on a single atom.

Bonding & Molecular Structure: General Chemistry Study Notes

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