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 chloride (NaCl) is melted and an electric current is passed through it. Which property of NaCl is being demonstrated?

Accepted Answer

Electrical conductivity in the molten state

Question 3

Which of the following best describes the bonding in metallic solids such as copper (Cu)?

Accepted Answer

Electrons are delocalized and move freely throughout the lattice

Question 4

Which of the following species contains bonds with the greatest ionic character?

Accepted Answer

SrO₂

Question 5

Which element below is LEAST likely to form covalent bonds?

Accepted Answer

Potassium (K)

Question 6

A molecule of ammonia (NH₃) has the following Lewis structure: the nitrogen atom is bonded to three hydrogen atoms and has one lone pair. What is the formal charge on the nitrogen atom?

Accepted Answer

0

Question 7

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

Accepted Answer

They have delocalized valence electrons that move freely

Question 8

Which of the following bonds is expected to be the most polar?

Accepted Answer

Na–Cl

Question 9

A student draws the Lewis dot symbol for the P³⁻ ion. Which of the following is correct?

Accepted Answer

The symbol P with eight dots and a 3– charge

Question 10

Which of the following statements about the octet rule is TRUE?

Accepted Answer

Elements like boron and beryllium can be stable with fewer than eight valence electrons

Question 11

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

Accepted Answer

Ionic bonding involves transferring electrons; covalent bonding involves sharing electrons

Question 12

Which of the following pairs of atoms would you expect to form a nonpolar covalent bond?

Accepted Answer

Br and Br

Question 13

A molecule has a bond with an electronegativity difference (ΔEN) of 0.3. What type of bond is this?

Accepted Answer

Nonpolar covalent

Question 14

Which of the following best explains why chlorine (Cl) is more electronegative than sodium (Na)?

Accepted Answer

Chlorine has more protons and a smaller atomic radius

Question 15

Which of the following is the correct formal charge calculation for the oxygen atom in carbon monoxide (CO), given the Lewis structure: C≡O with one lone pair on carbon and one lone pair on oxygen?

Accepted Answer

Question 16

Which of the following best describes the trend in electronegativity across a period in the periodic table?

Accepted Answer

It increases from left to right

Question 17

Which of the following compounds is most likely to have a high melting point and conduct electricity when molten?

Accepted Answer

NaCl

Question 18

A Lewis structure for a molecule shows a central atom with five bonds and one lone pair. Which element is most likely the central atom?

Accepted Answer

Phosphorus (P)

Question 19

Which of the following statements about formal charge is correct?

Accepted Answer

The sum of all formal charges in a polyatomic ion equals the ion's charge

Question 20

Which of the following best explains why the bond in H–F is highly polar?

Accepted Answer

Fluorine is much more electronegative than hydrogen

Chemical Bonding and Lewis Structures: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards