Question 1

Which of the following elements is most likely to form an expanded octet in a stable compound?

Accepted Answer

Phosphorus (P)

Question 2

A sample of sodium reacts with chlorine to form sodium chloride. Which statement best describes the bonding in NaCl?

Accepted Answer

Sodium donates an electron to chlorine, forming oppositely charged ions held together by electrostatic attraction.

Question 3

Which of the following molecules contains an atom with an incomplete octet?

Accepted Answer

BF3

Question 4

Which property is NOT typically attributed to metallic bonding?

Accepted Answer

Brittleness

Question 5

Arrange the following bonds in order of decreasing dipole moment: H–I, H–F, H–Br, H–Cl.

Accepted Answer

H–F \u003e H–Cl \u003e H–Br \u003e H–I

Question 6

Which of the following compounds is expected to have the most ionic character?

Accepted Answer

NaF

Question 7

How many shared electrons are around the oxygen atom in a molecule of CO2?

Accepted Answer

8

Question 8

Which of the following best explains why metals are good conductors of electricity?

Accepted Answer

They have loosely bound valence electrons that are free to move throughout the lattice.

Question 9

What is the formal charge on the nitrogen atom in ammonia (NH3)?

Accepted Answer

0

Question 10

Which of the following bonds is the most polar?

Accepted Answer

S–F

Question 11

A patient is exposed to carbon monoxide (CO). Using formal charge analysis, which atom in CO carries a negative formal charge in the most stable Lewis structure?

Accepted Answer

Carbon

Question 12

Which element is least likely to form covalent bonds?

Accepted Answer

Neon (Ne)

Question 13

Which of the following best describes the bond between carbon and oxygen in CO2?

Accepted Answer

Polar covalent

Question 14

A transition metal ion, Co+, is formed. Which of the following is true about its Lewis dot symbol?

Accepted Answer

It will have fewer valence electrons than neutral Co.

Question 15

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity decreases down a group and increases across a period.

Question 16

In the molecule N2F2, how many valence electrons does each nitrogen atom have, and how many electrons does each share with other atoms?

Accepted Answer

5 valence electrons, 4 shared electrons

Question 17

Which of the following best explains why ionic compounds conduct electricity when molten but not as solids?

Accepted Answer

Ions are free to move in the liquid state but fixed in place in the solid state.

Question 18

Which of the following best describes the electron behavior in a metallic bond?

Accepted Answer

Electrons are delocalized and move freely among metal ions.

Question 19

Which of the following molecules contains an atom with an expanded octet?

Accepted Answer

SF6

Question 20

A student is asked to draw the Lewis dot symbol for P3−. How many dots should be placed around the symbol?

Accepted Answer

8

Chemical Bonding and Lewis Structures: Study Notes for General Chemistry

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