Question 1

Which of the following best describes the nature of the bonding in metallic solids such as iron (Fe)?

Accepted Answer

Electrons are delocalized and free to move throughout the lattice.

Question 2

Which property is NOT characteristic of ionic compounds like NaCl?

Accepted Answer

Good electrical conductivity in solid form

Question 3

Given the equation $$E_{el} = \kappa \frac{Q_1$ Q_2$}{d}$$, which change would result in the greatest increase in lattice energy for an ionic compound?

Accepted Answer

Increasing the charges $$Q_1$$ and $$Q_2$$ and decreasing the distance $$d$$

Question 4

Which compound has the highest lattice energy according to the provided table?

Accepted Answer

ScN

Question 5

What is the main driving force for the formation of an ionic bond between sodium and chlorine?

Accepted Answer

The transfer of electrons from Na to Cl, resulting in electrostatic attraction between oppositely charged ions

Question 6

Which statement about the octet rule is correct?

Accepted Answer

Many main-group elements tend to gain, lose, or share electrons to achieve eight valence electrons.

Question 7

Which Lewis structure represents the dominant form of CO$$_2$$ based on formal charges?

Accepted Answer

$$\mathrm{O}=\mathrm{C}=\mathrm{O}$$, with all formal charges zero

Question 8

Which of the following molecules is an exception to the octet rule because it has fewer than eight electrons around the central atom?

Accepted Answer

BF$$_3$$

Question 9

Which element is the most electronegative according to the periodic trend?

Accepted Answer

Fluorine

Question 10

A bond between which pair of elements is most likely to be ionic?

Accepted Answer

Mg and Cl

Question 11

Which molecule below contains a triple bond?

Accepted Answer

N$$_2$$

Question 12

Which of the following statements about resonance structures is TRUE?

Accepted Answer

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

Question 13

Which molecule below is hypervalent, containing more than eight electrons around the central atom?

Accepted Answer

PCl$$_5$$

Question 14

Which bond is more polar: B-Cl or C-Cl? Indicate which atom has the partial negative charge.

Accepted Answer

C-Cl, with Cl having the partial negative charge

Question 15

Which of the following is the correct Lewis structure for the sulfate ion, SO$$_4$$^{2-}$$?

Accepted Answer

S surrounded by four O atoms, each O with a single bond and two O atoms carrying a negative charge

Question 16

Which of the following best explains why the bond length decreases as the number of shared electron pairs increases?

Accepted Answer

More shared pairs increase the attraction between nuclei and shared electrons, pulling atoms closer.

Question 17

Which of the following is the correct Lewis symbol for sulfur?

Accepted Answer

S with six dots around it

Question 18

Which statement about formal charge is correct?

Accepted Answer

The dominant Lewis structure is the one with formal charges closest to zero.

Question 19

Which molecule below is best described as a blend of multiple resonance structures?

Accepted Answer

SO$$_3$$

Question 20

Which of the following is a real-world example of a compound with a polar covalent bond?

Accepted Answer

H$$_2O$$

Chemistry Chapter 8

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드