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 patient is given a saline solution containing NaCl. Which type of chemical bond holds the Na and Cl atoms together in this compound?

Accepted Answer

Ionic bond

Question 3

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

Accepted Answer

Their valence electrons are delocalized and free to move.

Question 4

Which of the following molecules has the greatest dipole moment?

Accepted Answer

H–F

Question 5

Given the following bonds, which is the most polar?

Accepted Answer

S–F

Question 6

Which of the following elements is LEAST likely to form covalent bonds?

Accepted Answer

Sodium (Na)

Question 7

A Lewis Dot Symbol for the P³⁻ ion would show how many dots around the symbol?

Accepted Answer

8

Question 8

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

Accepted Answer

NaCl

Question 9

What is the formal charge on nitrogen in NH₃?

Accepted Answer

0

Question 10

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 11

A molecule of CO has a triple bond between C and O. Using the formal charge formula, what is the formal charge on carbon in CO?

Accepted Answer

+1

Question 12

Which of the following is an example of a bond formed by the sharing of two pairs of electrons?

Accepted Answer

Double bond in O₂

Question 13

Which of the following best explains why BeCl₂ is an exception to the octet rule?

Accepted Answer

Beryllium has fewer than eight electrons.

Question 14

Which of the following best describes the bonding in copper (Cu) metal?

Accepted Answer

Delocalized electrons shared among Cu atoms (metallic bonding)

Question 15

Arrange the following molecules 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 16

Which of the following best describes the Lewis Dot Symbol for a Cd²⁺ ion?

Accepted Answer

Cd with 0 dots

Question 17

A student is asked to classify the bond in C–H. Based on electronegativity difference, what type of bond is this?

Accepted Answer

Nonpolar covalent

Question 18

How many valence electrons are present in a neutral tellurium (Te) atom?

Accepted Answer

6

Question 19

Which of the following best explains why ionic compounds like MgO have high melting points?

Accepted Answer

They have strong electrostatic attractions between ions.

Question 20

In the ion NO₂⁻, what is the sum of the formal charges on all atoms?

Accepted Answer

-1

Chemical Bonding and Lewis Structures: Study Notes

Study Guide - Practice Questions