Question 1

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

Accepted Answer

Cl

Question 2

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

Accepted Answer

NaCl

Question 3

Which of the following is a physical property attributed to metallic bonding?

Accepted Answer

Conductivity

Question 4

Calculate the difference in electronegativity values between carbon and fluorine.

Accepted Answer

$$1.5$$

Question 5

For those listed below, which has the most polar bond?

Accepted Answer

H-F

Question 6

How many shared electrons are around the oxygen atom in the water molecule?

Accepted Answer

$$4$$

Question 7

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

Accepted Answer

BeCl$$_2$$

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

C

Question 10

How many lone pairs does the sulfur atom possess in the hydrogen sulfide molecule?

Accepted Answer

$$2$$

Question 11

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

Accepted Answer

The greater the bond strength, the shorter the bond.

Question 12

What is the average bond order of the sulfate-oxygen bonds within the sulfate ion, SO$$_4$$^{2-}$$?

Accepted Answer

$$1.5$$

Question 13

Which compound below should have the highest melting point according to the ionic bonding model?

Accepted Answer

AlF$$_3$$

Question 14

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 needed?

Accepted Answer

2 IE, 1 EA

Question 15

Which compound possesses the strongest ionic bond: MgBr$$_2 or $$KCl?

Accepted Answer

MgBr$$_2$$

Question 16

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

Accepted Answer

SF$$_6$$

Question 17

Which of the following best describes the free-flowing electrons in metallic bonding?

Accepted Answer

Valence electrons that move freely between metal atoms.

Question 18

Which of the following is true regarding the octet rule?

Accepted Answer

CO$$_2 is $$characterized by covalent bonding.

Question 19

Which of the following molecules contains the greatest number of sigma bonds?

Accepted Answer

C$$_2H$_6$$

Question 20

Which of the following is the best, most valid resonance structure for the phosphate ion, PO$$_4$$^{3-}$$?

Accepted Answer

The structure with one double bond and three single bonds, with negative charges on the three singly bonded oxygens.

Study Notes: Chemical Bonding I – The Lewis Model

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